78878568 has 16 divisors (see below), whose sum is σ = 197196480. Its totient is φ = 26292848.

The previous prime is 78878509. The next prime is 78878599. The reversal of 78878568 is 86587887.

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, 1643280 + ... + 1643327.

It is an arithmetic number, because the mean of its divisors is an integer number (12324780).

Almost surely, 2^78878568 is an apocalyptic number.

It is an amenable number.

78878568 is an abundant number, since it is smaller than the sum of its proper divisors (118317912).

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

78878568 is a wasteful number, since it uses less digits than its factorization.

78878568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286616 (or 3286612 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 57.

The square root of 78878568 is about 8881.3607065584. The cubic root of 78878568 is about 428.8640796091.

The spelling of 78878568 in words is "seventy-eight million, eight hundred seventy-eight thousand, five hundred sixty-eight".