78715256 has 16 divisors (see below), whose sum is σ = 147688800. Its totient is φ = 39331584.

The previous prime is 78715213. The next prime is 78715267. The reversal of 78715256 is 65251787.

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, 17000 + ... + 21128.

It is an arithmetic number, because the mean of its divisors is an integer number (9230550).

Almost surely, 2^78715256 is an apocalyptic number.

It is an amenable number.

78715256 is a deficient number, since it is larger than the sum of its proper divisors (68973544).

78715256 is a wasteful number, since it uses less digits than its factorization.

78715256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518 (or 6514 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 78715256 is about 8872.1618560529. The cubic root of 78715256 is about 428.5678984259.

The spelling of 78715256 in words is "seventy-eight million, seven hundred fifteen thousand, two hundred fifty-six".