397625424 has 40 divisors (see below), whose sum is σ = 1173942720. Its totient is φ = 113607168.

The previous prime is 397625411. The next prime is 397625447. The reversal of 397625424 is 424526793.

It is a super-2 number, since 2×397625424² = 316211955622359552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 591369 + ... + 592040.

It is an arithmetic number, because the mean of its divisors is an integer number (29348568).

Almost surely, 2^397625424 is an apocalyptic number.

It is an amenable number.

397625424 is an abundant number, since it is smaller than the sum of its proper divisors (776317296).

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

397625424 is a wasteful number, since it uses less digits than its factorization.

397625424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183427 (or 1183421 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 397625424 is about 19940.5472342160. The cubic root of 397625424 is about 735.3454029310.

The spelling of 397625424 in words is "three hundred ninety-seven million, six hundred twenty-five thousand, four hundred twenty-four".