977656856 has 32 divisors (see below), whose sum is σ = 2105006400. Its totient is φ = 420999840.

The previous prime is 977656843. The next prime is 977656877. The reversal of 977656856 is 658656779.

It is a junction number, because it is equal to n+sod(n) for n = 977656795 and 977656804.

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, 290690 + ... + 294033.

It is an arithmetic number, because the mean of its divisors is an integer number (65781450).

Almost surely, 2^977656856 is an apocalyptic number.

It is an amenable number.

977656856 is an abundant number, since it is smaller than the sum of its proper divisors (1127349544).

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

977656856 is a wasteful number, since it uses less digits than its factorization.

977656856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584759 (or 584755 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 59.

The square root of 977656856 is about 31267.5047933154. The cubic root of 977656856 is about 992.4961179307.

The spelling of 977656856 in words is "nine hundred seventy-seven million, six hundred fifty-six thousand, eight hundred fifty-six".