977208816 has 40 divisors (see below), whose sum is σ = 2526338304. Its totient is φ = 325493440.

The previous prime is 977208809. The next prime is 977208929. The reversal of 977208816 is 618802779.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 64531 + ... + 78221.

Almost surely, 2^977208816 is an apocalyptic number.

It is an amenable number.

977208816 is an abundant number, since it is smaller than the sum of its proper divisors (1549129488).

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

977208816 is a wasteful number, since it uses less digits than its factorization.

977208816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15189 (or 15183 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 977208816 is about 31260.3393455669. The cubic root of 977208816 is about 992.3444812550.

The spelling of 977208816 in words is "nine hundred seventy-seven million, two hundred eight thousand, eight hundred sixteen".