997584072 has 48 divisors (see below), whose sum is σ = 2649311760. Its totient is φ = 312965376.

The previous prime is 997584059. The next prime is 997584097. The reversal of 997584072 is 270485799.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64978 + ... + 78849.

It is an arithmetic number, because the mean of its divisors is an integer number (55193995).

Almost surely, 2^997584072 is an apocalyptic number.

It is an amenable number.

997584072 is an abundant number, since it is smaller than the sum of its proper divisors (1651727688).

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

997584072 is a wasteful number, since it uses less digits than its factorization.

997584072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143870 (or 143849 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 997584072 is about 31584.5543264425. The cubic root of 997584072 is about 999.1940412717.

The spelling of 997584072 in words is "nine hundred ninety-seven million, five hundred eighty-four thousand, seventy-two".