78456935928 has 32 divisors (see below), whose sum is σ = 224162674560. Its totient is φ = 22416267360.

The previous prime is 78456935917. The next prime is 78456935969. The reversal of 78456935928 is 82953965487.

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, 233502618 + ... + 233502953.

It is an arithmetic number, because the mean of its divisors is an integer number (7005083580).

Almost surely, 2^78456935928 is an apocalyptic number.

It is an amenable number.

78456935928 is an abundant number, since it is smaller than the sum of its proper divisors (145705738632).

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

78456935928 is a wasteful number, since it uses less digits than its factorization.

78456935928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467005587 (or 467005583 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 66.

The spelling of 78456935928 in words is "seventy-eight billion, four hundred fifty-six million, nine hundred thirty-five thousand, nine hundred twenty-eight".