397715968 has 40 divisors (see below), whose sum is σ = 855796788. Its totient is φ = 183558144.

The previous prime is 397715951. The next prime is 397716013. The reversal of 397715968 is 869517793.

It can be written as a sum of positive squares in 2 ways, for example, as 391723264 + 5992704 = 19792^2 + 2448^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23221 + ... + 36532.

Almost surely, 2^397715968 is an apocalyptic number.

It is an amenable number.

397715968 is an abundant number, since it is smaller than the sum of its proper divisors (458080820).

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

397715968 is an equidigital number, since it uses as much as digits as its factorization.

397715968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59784 (or 59768 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 55.

The square root of 397715968 is about 19942.8174539106. The cubic root of 397715968 is about 735.4012143028.

The spelling of 397715968 in words is "three hundred ninety-seven million, seven hundred fifteen thousand, nine hundred sixty-eight".