78928756 has 12 divisors (see below), whose sum is σ = 146250468. Its totient is φ = 37142912.

The previous prime is 78928699. The next prime is 78928771. The reversal of 78928756 is 65782987.

It can be written as a sum of positive squares in 2 ways, for example, as 68624656 + 10304100 = 8284^2 + 3210^2 .

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, 580291 + ... + 580426.

It is an arithmetic number, because the mean of its divisors is an integer number (12187539).

Almost surely, 2^78928756 is an apocalyptic number.

It is an amenable number.

78928756 is a deficient number, since it is larger than the sum of its proper divisors (67321712).

78928756 is a wasteful number, since it uses less digits than its factorization.

78928756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160738 (or 1160736 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The square root of 78928756 is about 8884.1857252086. The cubic root of 78928756 is about 428.9550179869.

The spelling of 78928756 in words is "seventy-eight million, nine hundred twenty-eight thousand, seven hundred fifty-six".