78256928 has 24 divisors (see below), whose sum is σ = 155570688. Its totient is φ = 38746944.

The previous prime is 78256903. The next prime is 78256931. The reversal of 78256928 is 82965287.

It is a super-2 number, since 2×78256928² = 12248293559994368, which contains 22 as substring.

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, 8576 + ... + 15167.

It is an arithmetic number, because the mean of its divisors is an integer number (6482112).

Almost surely, 2^78256928 is an apocalyptic number.

It is an amenable number.

78256928 is a deficient number, since it is larger than the sum of its proper divisors (77313760).

78256928 is a wasteful number, since it uses less digits than its factorization.

78256928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23856 (or 23848 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 78256928 is about 8846.2945915225. The cubic root of 78256928 is about 427.7344846325.

The spelling of 78256928 in words is "seventy-eight million, two hundred fifty-six thousand, nine hundred twenty-eight".