397881904 has 20 divisors (see below), whose sum is σ = 881024464. Its totient is φ = 170520768.

The previous prime is 397881877. The next prime is 397881919. The reversal of 397881904 is 409188793.

It is a happy number.

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, 1776147 + ... + 1776370.

Almost surely, 2^397881904 is an apocalyptic number.

It is an amenable number.

397881904 is an abundant number, since it is smaller than the sum of its proper divisors (483142560).

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

397881904 is a wasteful number, since it uses less digits than its factorization.

397881904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552532 (or 3552526 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 397881904 is about 19946.9773148715. The cubic root of 397881904 is about 735.5034753622.

The spelling of 397881904 in words is "three hundred ninety-seven million, eight hundred eighty-one thousand, nine hundred four".