40 (forty) is the number that is after thirty-nine and before forty-one.
| ||||
---|---|---|---|---|
Cardinal | forty | |||
Ordinal | 40th (fortieth) | |||
Factorization | 23× 5 | |||
Greek numeral | Μ´ | |||
Roman numeral | XL | |||
Binary | 1010002 | |||
Ternary | 11113 | |||
Quaternary | 2204 | |||
Quinary | 1305 | |||
Senary | 1046 | |||
Octal | 508 | |||
Duodecimal | 3412 | |||
Hexadecimal | 2816 | |||
Vigesimal | 2020 | |||
Base 36 | 1436 |
The prime factors of forty are 2 and 5. (2 * 2 * 2 * 5 = 40)
Forty is also the only number in the English language which is spelt in alphabetical order.
The Bible
In the Judeo-Christian Bible, the number forty has special meaning. The Jews wandered in a desert for forty years, there was a forty-day and forty-night rainstorm, and other instances.
Factors of 40
The factors of 40 are 1, 2, 4, 5, 8, 10, 20 and 40.
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