396931972 has 24 divisors (see below), whose sum is σ = 699955200. Its totient is φ = 196951296.

The previous prime is 396931957. The next prime is 396931981. The reversal of 396931972 is 279139693.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 426804 + ... + 427732.

It is an arithmetic number, because the mean of its divisors is an integer number (29164800).

Almost surely, 2^396931972 is an apocalyptic number.

It is an amenable number.

396931972 is a deficient number, since it is larger than the sum of its proper divisors (303023228).

396931972 is a wasteful number, since it uses less digits than its factorization.

396931972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1633 counting only the distinct ones).

The product of its digits is 551124, while the sum is 49.

The square root of 396931972 is about 19923.1516583095. The cubic root of 396931972 is about 734.9176775463.

The spelling of 396931972 in words is "three hundred ninety-six million, nine hundred thirty-one thousand, nine hundred seventy-two".