79974636 has 72 divisors (see below), whose sum is σ = 218405376. Its totient is φ = 22311840.

The previous prime is 79974607. The next prime is 79974673. The reversal of 79974636 is 63647997.

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 23 ways as a sum of consecutive naturals, for example, 185341 + ... + 185771.

It is an arithmetic number, because the mean of its divisors is an integer number (3033408).

Almost surely, 2^79974636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79974636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109202688).

79974636 is an abundant number, since it is smaller than the sum of its proper divisors (138430740).

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

79974636 is a wasteful number, since it uses less digits than its factorization.

79974636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 490 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 51.

The square root of 79974636 is about 8942.8539068912. The cubic root of 79974636 is about 430.8413956251.

The spelling of 79974636 in words is "seventy-nine million, nine hundred seventy-four thousand, six hundred thirty-six".