77976856 has 32 divisors (see below), whose sum is σ = 148579200. Its totient is φ = 38361600.

The previous prime is 77976823. The next prime is 77976869. The reversal of 77976856 is 65867977.

Its product of digits (4445280) is a multiple of the sum of its prime divisors (735).

It is a junction number, because it is equal to n+sod(n) for n = 77976797 and 77976806.

It is a congruent number.

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, 194256 + ... + 194656.

It is an arithmetic number, because the mean of its divisors is an integer number (4643100).

Almost surely, 2^77976856 is an apocalyptic number.

It is an amenable number.

77976856 is a deficient number, since it is larger than the sum of its proper divisors (70602344).

77976856 is a wasteful number, since it uses less digits than its factorization.

With its successor (77976857) it forms an eRAP, since the sums of their prime factors are consecutive (739 and 740).

77976856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 735 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 55.

The square root of 77976856 is about 8830.4504981343. The cubic root of 77976856 is about 427.2236048388.

The spelling of 77976856 in words is "seventy-seven million, nine hundred seventy-six thousand, eight hundred fifty-six".