78770432 has 36 divisors (see below), whose sum is σ = 169335180. Its totient is φ = 36354048.

The previous prime is 78770407. The next prime is 78770443. The reversal of 78770432 is 23407787.

It can be written as a sum of positive squares in 2 ways, for example, as 18800896 + 59969536 = 4336^2 + 7744^2 .

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, 8507 + ... + 15162.

It is an arithmetic number, because the mean of its divisors is an integer number (4703755).

Almost surely, 2^78770432 is an apocalyptic number.

It is an amenable number.

78770432 is an abundant number, since it is smaller than the sum of its proper divisors (90564748).

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

78770432 is a wasteful number, since it uses less digits than its factorization.

78770432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23698 (or 23684 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 78770432 is about 8875.2708127696. The cubic root of 78770432 is about 428.6680109099.

The spelling of 78770432 in words is "seventy-eight million, seven hundred seventy thousand, four hundred thirty-two".