997824972 has 24 divisors (see below), whose sum is σ = 2329927600. Its totient is φ = 332369856.

The previous prime is 997824967. The next prime is 997824973. The reversal of 997824972 is 279428799.

It is not an unprimeable number, because it can be changed into a prime (997824973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11947 + ... + 46242.

Almost surely, 2^997824972 is an apocalyptic number.

It is an amenable number.

997824972 is an abundant number, since it is smaller than the sum of its proper divisors (1332102628).

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

997824972 is a wasteful number, since it uses less digits than its factorization.

997824972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59625 (or 59623 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The square root of 997824972 is about 31588.3676691278. The cubic root of 997824972 is about 999.2744643921.

The spelling of 997824972 in words is "nine hundred ninety-seven million, eight hundred twenty-four thousand, nine hundred seventy-two".