77938976 has 24 divisors (see below), whose sum is σ = 153906480. Its totient is φ = 38851648.

The previous prime is 77938963. The next prime is 77938981. The reversal of 77938976 is 67983977.

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, 7595 + ... + 14613.

It is an arithmetic number, because the mean of its divisors is an integer number (6412770).

Almost surely, 2^77938976 is an apocalyptic number.

It is an amenable number.

77938976 is a deficient number, since it is larger than the sum of its proper divisors (75967504).

77938976 is a wasteful number, since it uses less digits than its factorization.

77938976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376 (or 7368 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 56.

The square root of 77938976 is about 8828.3053866526. The cubic root of 77938976 is about 427.1544140035.

The spelling of 77938976 in words is "seventy-seven million, nine hundred thirty-eight thousand, nine hundred seventy-six".