78564972 has 12 divisors (see below), whose sum is σ = 183318296. Its totient is φ = 26188320.

The previous prime is 78564953. The next prime is 78564977. The reversal of 78564972 is 27946587.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (78564977) 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, 3273529 + ... + 3273552.

Almost surely, 2^78564972 is an apocalyptic number.

It is an amenable number.

78564972 is an abundant number, since it is smaller than the sum of its proper divisors (104753324).

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

78564972 is a wasteful number, since it uses less digits than its factorization.

78564972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547088 (or 6547086 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 78564972 is about 8863.6883970501. The cubic root of 78564972 is about 428.2949825448.

The spelling of 78564972 in words is "seventy-eight million, five hundred sixty-four thousand, nine hundred seventy-two".