397556616 has 16 divisors (see below), whose sum is σ = 993891600. Its totient is φ = 132518864.

The previous prime is 397556603. The next prime is 397556651. The reversal of 397556616 is 616655793.

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, 8282406 + ... + 8282453.

It is an arithmetic number, because the mean of its divisors is an integer number (62118225).

Almost surely, 2^397556616 is an apocalyptic number.

It is an amenable number.

397556616 is an abundant number, since it is smaller than the sum of its proper divisors (596334984).

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

397556616 is a wasteful number, since it uses less digits than its factorization.

397556616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16564868 (or 16564864 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 48.

The square root of 397556616 is about 19938.8218307903. The cubic root of 397556616 is about 735.3029839757.

The spelling of 397556616 in words is "three hundred ninety-seven million, five hundred fifty-six thousand, six hundred sixteen".