397688 has 8 divisors (see below), whose sum is σ = 745680. Its totient is φ = 198840.

The previous prime is 397687. The next prime is 397697. The reversal of 397688 is 886793.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24848 + ... + 24863.

It is an arithmetic number, because the mean of its divisors is an integer number (93210).

2³⁹⁷⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

397688 is a deficient number, since it is larger than the sum of its proper divisors (347992).

397688 is a wasteful number, since it uses less digits than its factorization.

397688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49717 (or 49713 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 397688 is about 630.6250867195. The cubic root of 397688 is about 73.5383975716.

The spelling of 397688 in words is "three hundred ninety-seven thousand, six hundred eighty-eight".