79797636 has 30 divisors (see below), whose sum is σ = 208607630. Its totient is φ = 26599104.

The previous prime is 79797629. The next prime is 79797659. The reversal of 79797636 is 63679797.

It can be written as a sum of positive squares in only one way, i.e., 78428736 + 1368900 = 8856^2 + 1170^2 .

It is a super-2 number, since 2×79797636² = 12735325422376992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 122821 + ... + 123468.

Almost surely, 2^79797636 is an apocalyptic number.

It is an amenable number.

79797636 is an abundant number, since it is smaller than the sum of its proper divisors (128809994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79797636 is a wasteful number, since it uses less digits than its factorization.

79797636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246305 (or 246294 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 54.

The square root of 79797636 is about 8932.9522555536. The cubic root of 79797636 is about 430.5233145479.

The spelling of 79797636 in words is "seventy-nine million, seven hundred ninety-seven thousand, six hundred thirty-six".