397685188 has 12 divisors (see below), whose sum is σ = 702454032. Its totient is φ = 196984040.

The previous prime is 397685179. The next prime is 397685191. The reversal of 397685188 is 881586793.

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, 464158 + ... + 465013.

It is an arithmetic number, because the mean of its divisors is an integer number (58537836).

Almost surely, 2^397685188 is an apocalyptic number.

It is an amenable number.

397685188 is a deficient number, since it is larger than the sum of its proper divisors (304768844).

397685188 is a wasteful number, since it uses less digits than its factorization.

397685188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929282 (or 929280 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The square root of 397685188 is about 19942.0457325722. The cubic root of 397685188 is about 735.3822424442.

The spelling of 397685188 in words is "three hundred ninety-seven million, six hundred eighty-five thousand, one hundred eighty-eight".