977159988 has 72 divisors (see below), whose sum is σ = 2920270080. Its totient is φ = 269559360.

The previous prime is 977159977. The next prime is 977160001. The reversal of 977159988 is 889951779.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59548 + ... + 74163.

Almost surely, 2^977159988 is an apocalyptic number.

It is an amenable number.

977159988 is an abundant number, since it is smaller than the sum of its proper divisors (1943110092).

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

977159988 is a wasteful number, since it uses less digits than its factorization.

977159988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133757 (or 133752 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 63.

The square root of 977159988 is about 31259.5583462083. The cubic root of 977159988 is about 992.3279528861.

The spelling of 977159988 in words is "nine hundred seventy-seven million, one hundred fifty-nine thousand, nine hundred eighty-eight".