977728808 has 32 divisors (see below), whose sum is σ = 2098833600. Its totient is φ = 418286592.

The previous prime is 977728793. The next prime is 977728831. The reversal of 977728808 is 808827779.

977728808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 17183 + ... + 47441.

It is an arithmetic number, because the mean of its divisors is an integer number (65588550).

Almost surely, 2^977728808 is an apocalyptic number.

It is an amenable number.

977728808 is an abundant number, since it is smaller than the sum of its proper divisors (1121104792).

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

977728808 is a wasteful number, since it uses less digits than its factorization.

977728808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30849 (or 30845 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 56.

The square root of 977728808 is about 31268.6553596409. The cubic root of 977728808 is about 992.5204653720.

The spelling of 977728808 in words is "nine hundred seventy-seven million, seven hundred twenty-eight thousand, eight hundred eight".