Seventy

Properties

The prime factorization of 70 is 2,5,7. In total, the factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70 itself. The sum of its divisors are 74, making 70 abundant, and because all of its divisors are deficient, 70 is a primitive abundant number. Because 74 is four more than 70, and none of 70's divisors add up to 4, they can't add up to 70 either, so it's not semiperfect. This makes 70 a weird number.

For other bases

1. In binary, 70 is 1000110.
2. In ternary, 70 is 2121.
3. In quaternary, 70 is 1012.
4. In quinary, 70 is 240.
5. In seximal, 70 is 154.
6. In septimal, 70 is 130.
7. In octal, 70 is 106.
8. In nonary, 70 is 77.
9. In decimal, 70.
10. In base 11, 70 is 64.
11. In base 69, 70 is 11.
12. In base 70, 70 is 10.
13. In higher bases, 70 is Ñ.