397686 has 16 divisors (see below), whose sum is σ = 806400. Its totient is φ = 130728.

The previous prime is 397673. The next prime is 397687. The reversal of 397686 is 686793.

397686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

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 in 7 ways as a sum of consecutive naturals, for example, 55 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2³⁹⁷⁶⁸⁶ is an apocalyptic number.

397686 is an abundant number, since it is smaller than the sum of its proper divisors (408714).

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

397686 is a wasteful number, since it uses less digits than its factorization.

397686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its digits is 54432, while the sum is 39.

The square root of 397686 is about 630.6235009893. The cubic root of 397686 is about 73.5382742949.

The spelling of 397686 in words is "three hundred ninety-seven thousand, six hundred eighty-six".