76857978 has 16 divisors (see below), whose sum is σ = 156011040. Its totient is φ = 25236816.

The previous prime is 76857961. The next prime is 76858007. The reversal of 76857978 is 87975867.

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, 95193 + ... + 95996.

It is an arithmetic number, because the mean of its divisors is an integer number (9750690).

Almost surely, 2^76857978 is an apocalyptic number.

76857978 is an abundant number, since it is smaller than the sum of its proper divisors (79153062).

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

76857978 is a wasteful number, since it uses less digits than its factorization.

76857978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191261.

The product of its digits is 5927040, while the sum is 57.

The square root of 76857978 is about 8766.8681979370. The cubic root of 76857978 is about 425.1703639946.

The spelling of 76857978 in words is "seventy-six million, eight hundred fifty-seven thousand, nine hundred seventy-eight".