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# 70 (number)

70 (seventy) is the natural number following 69 and preceding 71.

 Cardinal seventy Ordinal 70th (seventieth) Numeral system Factorization $2 \cdot 5 \cdot 7$ Divisors 2, 5, 7, 10, 14, 35 Roman numeral LXX Binary 1000110 Hexadecimal 46 Hebrew ע (Ayin)

## In mathematics

70 is a Pell number and a Harshad number. Its factorization makes it a sphenic number. It is the seventh pentagonal number and the fourth 13-gonal number, as well as a pentatope number. It is the smallest weird number.

## In other fields

70 is also:

03-10-2013 05:06:04