397249628 has 24 divisors (see below), whose sum is σ = 714843360. Its totient is φ = 193078080.

The previous prime is 397249603. The next prime is 397249637. The reversal of 397249628 is 826942793.

It is a super-2 number, since 2×397249628² = 315614533892276768, which contains 22 as substring.

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, 14513 + ... + 31703.

It is an arithmetic number, because the mean of its divisors is an integer number (29785140).

Almost surely, 2^397249628 is an apocalyptic number.

It is an amenable number.

397249628 is a deficient number, since it is larger than the sum of its proper divisors (317593732).

397249628 is a wasteful number, since it uses less digits than its factorization.

397249628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17357 (or 17355 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 397249628 is about 19931.1220958580. The cubic root of 397249628 is about 735.1136714685.

The spelling of 397249628 in words is "three hundred ninety-seven million, two hundred forty-nine thousand, six hundred twenty-eight".