977808684 has 12 divisors (see below), whose sum is σ = 2281553624. Its totient is φ = 325936224.

The previous prime is 977808679. The next prime is 977808697. The reversal of 977808684 is 486808779.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×977808684² = 1912219645011623712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40742017 + ... + 40742040.

Almost surely, 2^977808684 is an apocalyptic number.

It is an amenable number.

977808684 is an abundant number, since it is smaller than the sum of its proper divisors (1303744940).

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

977808684 is a wasteful number, since it uses less digits than its factorization.

977808684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81484064 (or 81484062 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 57.

The square root of 977808684 is about 31269.9325870716. The cubic root of 977808684 is about 992.5474927731.

The spelling of 977808684 in words is "nine hundred seventy-seven million, eight hundred eight thousand, six hundred eighty-four".