397996572 has 24 divisors (see below), whose sum is σ = 977536000. Its totient is φ = 125683056.

The previous prime is 397996567. The next prime is 397996583. The reversal of 397996572 is 275699793.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 872572 + ... + 873027.

Almost surely, 2^397996572 is an apocalyptic number.

It is an amenable number.

397996572 is an abundant number, since it is smaller than the sum of its proper divisors (579539428).

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

397996572 is a wasteful number, since it uses less digits than its factorization.

397996572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745625 (or 1745623 counting only the distinct ones).

The product of its digits is 6429780, while the sum is 57.

The square root of 397996572 is about 19949.8514280182. The cubic root of 397996572 is about 735.5741249787.

The spelling of 397996572 in words is "three hundred ninety-seven million, nine hundred ninety-six thousand, five hundred seventy-two".