977195220 has 48 divisors (see below), whose sum is σ = 2737784448. Its totient is φ = 260429440.

The previous prime is 977195209. The next prime is 977195239. The reversal of 977195220 is 22591779.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124657 + ... + 132263.

It is an arithmetic number, because the mean of its divisors is an integer number (57037176).

Almost surely, 2^977195220 is an apocalyptic number.

It is an amenable number.

977195220 is an abundant number, since it is smaller than the sum of its proper divisors (1760589228).

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

977195220 is a wasteful number, since it uses less digits than its factorization.

977195220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9760 (or 9758 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 977195220 is about 31260.1218807605. The cubic root of 977195220 is about 992.3398790390.

The spelling of 977195220 in words is "nine hundred seventy-seven million, one hundred ninety-five thousand, two hundred twenty".