78964728 has 32 divisors (see below), whose sum is σ = 209025360. Its totient is φ = 24773120.

The previous prime is 78964679. The next prime is 78964759. The reversal of 78964728 is 82746987.

It is a super-2 number, since 2×78964728² = 12470856536227968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96363 + ... + 97178.

Almost surely, 2^78964728 is an apocalyptic number.

It is an amenable number.

78964728 is an abundant number, since it is smaller than the sum of its proper divisors (130060632).

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

78964728 is a wasteful number, since it uses less digits than its factorization.

78964728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193567 (or 193563 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 78964728 is about 8886.2099907666. The cubic root of 78964728 is about 429.0201739036.

The spelling of 78964728 in words is "seventy-eight million, nine hundred sixty-four thousand, seven hundred twenty-eight".