79647728 has 20 divisors (see below), whose sum is σ = 154718520. Its totient is φ = 39720384.

The previous prime is 79647719. The next prime is 79647731. The reversal of 79647728 is 82774697.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 12621.

It is an arithmetic number, because the mean of its divisors is an integer number (7735926).

Almost surely, 2^79647728 is an apocalyptic number.

It is an amenable number.

79647728 is a deficient number, since it is larger than the sum of its proper divisors (75070792).

79647728 is a wasteful number, since it uses less digits than its factorization.

79647728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12944 (or 12938 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 79647728 is about 8924.5575800708. The cubic root of 79647728 is about 430.2535515624.

The spelling of 79647728 in words is "seventy-nine million, six hundred forty-seven thousand, seven hundred twenty-eight".