79724520 has 64 divisors (see below), whose sum is σ = 265752000. Its totient is φ = 21259584.

The previous prime is 79724503. The next prime is 79724531. The reversal of 79724520 is 2542797.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35830 + ... + 37989.

It is an arithmetic number, because the mean of its divisors is an integer number (4152375).

Almost surely, 2^79724520 is an apocalyptic number.

It is an amenable number.

79724520 is an abundant number, since it is smaller than the sum of its proper divisors (186027480).

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

79724520 is a wasteful number, since it uses less digits than its factorization.

79724520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73839 (or 73829 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 79724520 is about 8928.8588296601. The cubic root of 79724520 is about 430.3917828247.

The spelling of 79724520 in words is "seventy-nine million, seven hundred twenty-four thousand, five hundred twenty".