78974564 has 12 divisors (see below), whose sum is σ = 145479600. Its totient is φ = 37408968.

The previous prime is 78974561. The next prime is 78974573. The reversal of 78974564 is 46547987.

It is not an unprimeable number, because it can be changed into a prime (78974561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519494 + ... + 519645.

It is an arithmetic number, because the mean of its divisors is an integer number (12123300).

Almost surely, 2^78974564 is an apocalyptic number.

It is an amenable number.

78974564 is a deficient number, since it is larger than the sum of its proper divisors (66505036).

78974564 is a wasteful number, since it uses less digits than its factorization.

78974564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039162 (or 1039160 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The square root of 78974564 is about 8886.7634153273. The cubic root of 78974564 is about 429.0379863597.

The spelling of 78974564 in words is "seventy-eight million, nine hundred seventy-four thousand, five hundred sixty-four".