397361688 has 32 divisors (see below), whose sum is σ = 1014543360. Its totient is φ = 129635360.

The previous prime is 397361677. The next prime is 397361707. The reversal of 397361688 is 886163793.

It is a super-2 number, since 2×397361688² = 315792622180418688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397361688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175008 + ... + 177263.

It is an arithmetic number, because the mean of its divisors is an integer number (31704480).

Almost surely, 2^397361688 is an apocalyptic number.

It is an amenable number.

397361688 is an abundant number, since it is smaller than the sum of its proper divisors (617181672).

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

397361688 is a wasteful number, since it uses less digits than its factorization.

397361688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352327 (or 352323 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 397361688 is about 19933.9330790489. The cubic root of 397361688 is about 735.1827876175.

The spelling of 397361688 in words is "three hundred ninety-seven million, three hundred sixty-one thousand, six hundred eighty-eight".