972811980 has 72 divisors (see below), whose sum is σ = 3372419232. Its totient is φ = 222356736.

The previous prime is 972811963. The next prime is 972811991. The reversal of 972811980 is 89118279.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 384777 + ... + 387296.

It is an arithmetic number, because the mean of its divisors is an integer number (46839156).

Almost surely, 2^972811980 is an apocalyptic number.

972811980 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

972811980 is an abundant number, since it is smaller than the sum of its proper divisors (2399607252).

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

972811980 is a wasteful number, since it uses less digits than its factorization.

972811980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772095 (or 772090 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 972811980 is about 31189.9339531202. The cubic root of 972811980 is about 990.8539311153.

The spelling of 972811980 in words is "nine hundred seventy-two million, eight hundred eleven thousand, nine hundred eighty".