78609568 has 24 divisors (see below), whose sum is σ = 158058432. Its totient is φ = 38467776.

The previous prime is 78609551. The next prime is 78609599. The reversal of 78609568 is 86590687.

It is a super-2 number, since 2×78609568² = 12358928362293248, which contains 22 as substring.

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, 24630 + ... + 27637.

It is an arithmetic number, because the mean of its divisors is an integer number (6585768).

Almost surely, 2^78609568 is an apocalyptic number.

It is an amenable number.

78609568 is an abundant number, since it is smaller than the sum of its proper divisors (79448864).

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

78609568 is a wasteful number, since it uses less digits than its factorization.

78609568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52324 (or 52316 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 78609568 is about 8866.2036971863. The cubic root of 78609568 is about 428.3760052097.

The spelling of 78609568 in words is "seventy-eight million, six hundred nine thousand, five hundred sixty-eight".