70 (number)

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

 List of numbers — Integers << 70 71 72 73 74 75 76 77 78 79 >>
Cardinal seventy
Ordinal70th (seventieth)
Numeral system
Factorization[itex]2 \cdot 5 \cdot 7[itex]
Divisors 2, 5, 7, 10, 14, 35
Roman numeralLXX
Binary1000110
Hebrewע (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:

• Art and Cultures
• Countries of the World (http://www.academickids.com/encyclopedia/index.php/Countries)
• Space and Astronomy