|
Number: 40 |
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| Facts about the number: 40 is the number of attempts needed before the creation of the "water displacing" substance in the spray WD-40. 40 is the number of positions on a number of radio countdown programs, most notably American Top 40 and American Country Countdown. 40 is the customary number of hours in a regular workweek in some Western countries. 40 is the number of eggs that female alligators lay, which hatch in 60 - 70 days. 40 is the percentage of U.S. paper currency in circulation that was counterfeit by the end of the Civil War. 40 is a repdigit in base 3 (1111) and a Harshad number in base 10. 40 is the only number whose letters are in alphabetical order. 40 is the number of n-queens problem solutions for n = 7. 40 is an octagonal number, and as the sum of the first four pentagonal numbers, it is a pentagonal pyramidal number. |
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| The number of digits in the number: \( n \): \( d = \lfloor \log_{10}(n) \rfloor + 1 \) |
2 | |
| Sum of the digits: \( n \): \( S = \sum_{i=1}^{k} d_i \) |
4 | |
| Reverse number: \( \text{Reverse}(n) = \sum_{i=1}^{k} d_i \cdot 10^{k-i} \) |
0.025 | |
| Binary number system: \( n = \sum_{i=0}^{k-1} d_i \cdot 2^i \) |
111111001110 | |
| Hexadecimal number system: \( n = \sum_{i=0}^{k-1} d_i \cdot 16^i \) |
fce | |
| Parity of the number: \( \text{Parity}(n) = n \mod 2 \) |
even | |
| Simplicity of the number: \(\text{IsPrime}(n) = n > 1 \land \forall d \in [2, \sqrt{n}], n \mod d \neq 0\) |
false | |
| The square root: \(\sqrt{n} = n^{\frac{1}{2}}\) |
6.3245553203368 | |
| The factorial of the number: \( n!=n \times (n-1) \times (n-2) \times \ldots \times 2 \times 1 \) |
8.159152832479E+47 | |
| The sign of the number: \(\text{sign}(n) = \begin{cases} 1, & \text{if } n>0 \ 0, & \text{if } n=0 \ -1, & \text{if } n<0 \end{cases}\) |
+ | |
| The nearest multiple of 10: \(\text{10}(n) = 10 \times \left\lfloor \frac{n + 5}{10} \right\rfloor\) |
0 | |
| The nearest multiple of 100: \(\text{100}(n) = 100 \times \left\lfloor \frac{n + 50}{100} \right\rfloor\) |
0 | |
| Sine: \(\sin(x) = \sum_{n=0}^{\infty} \frac{(-1)^n x^{2n+1}}{(2n+1)!}\) |
0.74511316047935 | |
| Cosine: \(\cos(x) = \sum_{n=0}^{\infty} \frac{(-1)^n x^{2n}}{(2n)!}\) |
-0.66693806165226 | |
| Tangent: \(\tan(x) = \sum_{n=0}^{\infty} \frac{(-1)^n 2^{2n} (2^{2n} - 1) B_{2n} x^{2n-1}}{(2n)!}\) |
-1.1172149309239 | |
| The square of the number: \(\text{square}(n) = n^2\) |
1600 | |
| Cubic root: \(\text{}(n) = \sqrt[3]{n}\) |
3.4199518933534 | |
| Natural logarithm: \(\ln(ab) = \ln(a) + \ln(b)\) |
3.6888794541139 | |
| Common logarithm: \(\log_{10}(ab) = \log_{10}(a) + \log_{10}(b)\) |
1.602059991328 | |
| All divisors of a number: \( D(n) = \{ d \in \mathbb{Z}^+ : n \mod d = 0 \} \) |
1, 2, 4, 5, 8, 10, 20, 40 | |
| Base64: | NDAuNDY= | |
| SHA1: | 6112dc595d0a30c7486c4aac57f9a1617c40929a | |
| MD5: | a5f7f8109dd09e56b71dc6d2be49f52f | |
| Converts a number to a Roman representation: | XL | |
| Converting the number of seconds to days, hours, minutes and seconds: | days: 0, hours: 0, minutes: 0, seconds: 40. | |
| Converts a number to a date in UNIX time format: | ||
| Chinese: | 1970 月 1 星期四 | |
| Spanish: | 1970 Enero 1 Jueves | |
| English: | 1970 January 1 Thursday | |
| Hindi: | 1970 जनवरी 1 गुरुवार | |
| Arab: | 1970 يناير 1 الخميس | |
| Bengal: | 1970 জানুয়ারী 1 বৃহস্পতিবার | |
| Portuguese: | 1970 Janeiro 1 Quinta-feira | |
| Russian: | 1970 Январь 1 Четверг | |
| Japanese: | 1970 一月 1 木曜日 | |
| Lahnda: | 1970 جنوری 1 جمعرات | |
| Marathi: | 1970 जानेवारी 1 गुरुवार | |
| Telugu: | 1970 జనవరి 1 గురువారం | |
| Malay: | 1970 Januari 1 Khamis | |
| Turkish: | 1970 Ocak 1 Perşembe | |
| Korean: | 1970 1월 1 목요일 | |
| French: | 1970 Janvier 1 Jeudi | |
| German: | 1970 Januar 1 Donnerstag | |
| Vietnamese: | 1970 Tháng Một 1 Thứ năm | |
| Tamil: | 1970 ஜனவரி 1 வியாழக்கிழமை | |
| Urdu: | 1970 جنوری 1 جمعرات | |
| Javanese: | 1970 Januari 1 Kemis | |
| Italian: | 1970 Gennaio 1 Giovedì | |
| Persian: | 1970 ژانویه 1 پنجشنبه | |
| Gujaratis: | 1970 જાન્યુઆરી 1 ગુરુવાર | |
| Length: | ||
| 40 kilometers = 40,000.00 meters | ||
| 40 miles = 64,373.60 meters | ||
| 40 feet = 12.19 meters | ||
| 40 inches = 1.02 meters | ||
| 40 yards = 36.58 meters | ||
| 40 meters = 0.04 kilometers | ||
| 40 meters = 0.02 miles | ||
| 40 meters = 131.23 feet | ||
| 40 meters = 1,574.80 inches | ||
| 40 meters = 43.74 yards | ||
| Weight: | ||
| 40 pounds = 18.14 kilograms | ||
| 40 grams = 0.04 kilograms | ||
| 40 ounces = 1.13 kilograms | ||
| 40 tons = 36,287.40 kilograms | ||
| 40 kilograms = 88.18 pounds | ||
| 40 kilograms = 40,000.00 grams | ||
| 40 kilograms = 1,410.96 ounces | ||
| 40 kilograms = 0.04 tons | ||
| Volume: | ||
| 40 gallons = 151.42 liters | ||
| 40 milliliters = 0.04 liters | ||
| 40 cubic meters = 40,000.00 liters | ||
| 40 liters = 10.57 gallons | ||
| 40 liters = 40,000.00 milliliters | ||
| 40 liters = 0.04 cubic meters | ||
| Area: | ||
| 40 acres = 161,874.40 square meters | ||
| 40 hectares = 400,000.00 square meters | ||
| 40 square feet = 3.72 square meters | ||
| 40 square inches = 0.03 square meters | ||
| 40 square meters = 0.01 acres | ||
| 40 square meters = 0.00 hectares | ||
| 40 square meters = 430.56 square feet | ||
| 40 square meters = 62,000.12 square inches | ||
| Temperature: | ||
| 40 celsius = 104.00 fahrenheit | ||
| 40 celsius = 313.15 kelvin | ||
| 40 fahrenheit = 4.44 celsius | ||
| 40 fahrenheit = 277.59 kelvin | ||
| 40 kelvin = -233.15 celsius | ||
| 40 kelvin = -387.67 fahrenheit | ||
| Time: | ||
| 40 seconds = 0.67 minutes | ||
| 40 seconds = 0.01 hours | ||
| 40 seconds = 0.00 days | ||
| 40 minutes = 2,400.00 seconds | ||
| 40 minutes = 0.67 hours | ||
| 40 minutes = 0.03 days | ||
| 40 hours = 144,000.00 seconds | ||
| 40 hours = 2,400.00 minutes | ||
| 40 hours = 1.67 days | ||
| 40 days = 3,456,000.00 seconds | ||
| 40 days = 57,600.00 minutes | ||
| 40 days = 960.00 hours | ||
| Energy: | ||
| 40 joules = 9.56 calories | ||
| 40 joules = 0.04 kilojoules | ||
| 40 joules = 0.01 watt hours | ||
| 40 calories = 167.36 joules | ||
| 40 calories = 0.17 kilojoules | ||
| 40 kilojoules = 40,000.00 joules | ||
| 40 kilojoules = 9,560.24 calories | ||
| 40 watt hours = 144,000.00 joules | ||
| 40 watt hours = 144.00 kilojoules | ||
| Information: | ||
| 40 bytes = 0.04 kilobytes | ||
| 40 kilobytes = 40,960.00 bytes | ||
| 40 kilobytes = 0.04 megabytes | ||
| 40 megabytes = 40,960.00 kilobytes | ||
| 40 megabytes = 0.04 gigabytes | ||
| 40 gigabytes = 40,960.00 megabytes | ||
| 40 gigabytes = 0.04 terabytes | ||
| 40 terabytes = 40,960.00 gigabytes | ||