972577820 has 24 divisors (see below), whose sum is σ = 2162556144. Its totient is φ = 366146816.

The previous prime is 972577799. The next prime is 972577841. The reversal of 972577820 is 28775279.

It is an interprime number because it is at equal distance from previous prime (972577799) and next prime (972577841).

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, 1429922 + ... + 1430601.

It is an arithmetic number, because the mean of its divisors is an integer number (90106506).

Almost surely, 2^972577820 is an apocalyptic number.

It is an amenable number.

972577820 is an abundant number, since it is smaller than the sum of its proper divisors (1189978324).

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

972577820 is a wasteful number, since it uses less digits than its factorization.

972577820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860549 (or 2860547 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 972577820 is about 31186.1799520236. The cubic root of 972577820 is about 990.7744238108.

The spelling of 972577820 in words is "nine hundred seventy-two million, five hundred seventy-seven thousand, eight hundred twenty".