397099660 has 12 divisors (see below), whose sum is σ = 833909328. Its totient is φ = 158839856.

The previous prime is 397099643. The next prime is 397099699. The reversal of 397099660 is 66990793.

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, 9927472 + ... + 9927511.

It is an arithmetic number, because the mean of its divisors is an integer number (69492444).

Almost surely, 2^397099660 is an apocalyptic number.

It is an amenable number.

397099660 is an abundant number, since it is smaller than the sum of its proper divisors (436809668).

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

397099660 is a wasteful number, since it uses less digits than its factorization.

397099660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19854992 (or 19854990 counting only the distinct ones).

The product of its (nonzero) digits is 551124, while the sum is 49.

The square root of 397099660 is about 19927.3595842500. The cubic root of 397099660 is about 735.0211541569.

The spelling of 397099660 in words is "three hundred ninety-seven million, ninety-nine thousand, six hundred sixty".