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Cardinal | seventy | |||
Ordinal | 70th (seventieth) | |||
Factorization | 2 × 5 × 7 | |||
Divisors | 1, 2, 5, 7, 10, 14, 35, 70 | |||
Greek numeral | Ο´ | |||
Roman numeral | LXX | |||
Binary | 10001102 | |||
Ternary | 21213 | |||
Senary | 1546 | |||
Octal | 1068 | |||
Duodecimal | 5A12 | |||
Hexadecimal | 4616 | |||
Hebrew | ע | |||
Lao | ໗ |
70 (seventy) is the natural number following 69 and preceding 71.
70 is:
The sum of the first 24 squares starting from 1 is 702 = 4900, i.e. a square pyramidal number. This is the only non trivial solution to the cannonball problem and relates 70 to the Leech lattice and thus string theory.
See also: List of highways numbered 70 |
Main article: number name |
Several languages, especially ones with vigesimal number systems, do not have a specific word for 70: for example, French: soixante-dix, lit. 'sixty-ten'; Danish: halvfjerds, short for halvfjerdsindstyve, 'three and a half score'. (For French, this is true only in France; other French-speaking regions such as Belgium, Switzerland, Aosta Valley and Jersey use septante.[8])