78572320 has 48 divisors (see below), whose sum is σ = 186157440. Its totient is φ = 31339264.

The previous prime is 78572311. The next prime is 78572369. The reversal of 78572320 is 2327587.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108921 + ... + 109639.

It is an arithmetic number, because the mean of its divisors is an integer number (3878280).

Almost surely, 2^78572320 is an apocalyptic number.

It is an amenable number.

78572320 is an abundant number, since it is smaller than the sum of its proper divisors (107585120).

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

78572320 is a wasteful number, since it uses less digits than its factorization.

78572320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 1409 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 78572320 is about 8864.1028874895. The cubic root of 78572320 is about 428.3083346080.

The spelling of 78572320 in words is "seventy-eight million, five hundred seventy-two thousand, three hundred twenty".