397607660 has 12 divisors (see below), whose sum is σ = 834976128. Its totient is φ = 159043056.

The previous prime is 397607659. The next prime is 397607671. The reversal of 397607660 is 66706793.

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, 9940172 + ... + 9940211.

It is an arithmetic number, because the mean of its divisors is an integer number (69581344).

Almost surely, 2^397607660 is an apocalyptic number.

It is an amenable number.

397607660 is an abundant number, since it is smaller than the sum of its proper divisors (437368468).

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

397607660 is a wasteful number, since it uses less digits than its factorization.

397607660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19880392 (or 19880390 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 44.

The square root of 397607660 is about 19940.1018051564. The cubic root of 397607660 is about 735.3344521974.

The spelling of 397607660 in words is "three hundred ninety-seven million, six hundred seven thousand, six hundred sixty".