397908 has 36 divisors (see below), whose sum is σ = 1150240. Its totient is φ = 113616.

The previous prime is 397907. The next prime is 397921. The reversal of 397908 is 809793.

397908 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 538 + ... + 1041.

2³⁹⁷⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

397908 is an abundant number, since it is smaller than the sum of its proper divisors (752332).

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

397908 is a wasteful number, since it uses less digits than its factorization.

397908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 397908 is about 630.7994927075. The cubic root of 397908 is about 73.5519554906.

The spelling of 397908 in words is "three hundred ninety-seven thousand, nine hundred eight".