77931404 has 12 divisors (see below), whose sum is σ = 138616128. Its totient is φ = 38326800.

The previous prime is 77931379. The next prime is 77931421. The reversal of 77931404 is 40413977.

It is a super-2 number, since 2×77931404² = 12146607458822432, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159452 + ... + 159939.

It is an arithmetic number, because the mean of its divisors is an integer number (11551344).

Almost surely, 2^77931404 is an apocalyptic number.

It is an amenable number.

77931404 is a deficient number, since it is larger than the sum of its proper divisors (60684724).

77931404 is a wasteful number, since it uses less digits than its factorization.

77931404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319456 (or 319454 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 77931404 is about 8827.8765283617. The cubic root of 77931404 is about 427.1405804544.

The spelling of 77931404 in words is "seventy-seven million, nine hundred thirty-one thousand, four hundred four".