396911972 has 24 divisors (see below), whose sum is σ = 724416000. Its totient is φ = 190068480.

The previous prime is 396911969. The next prime is 396911981. The reversal of 396911972 is 279119693.

It is a super-2 number, since 2×396911972² = 315078227033857568, which contains 22 as substring.

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, 4472 + ... + 28527.

It is an arithmetic number, because the mean of its divisors is an integer number (30184000).

Almost surely, 2^396911972 is an apocalyptic number.

It is an amenable number.

396911972 is a deficient number, since it is larger than the sum of its proper divisors (327504028).

396911972 is a wasteful number, since it uses less digits than its factorization.

396911972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33131 (or 33129 counting only the distinct ones).

The product of its digits is 183708, while the sum is 47.

The square root of 396911972 is about 19922.6497233676. The cubic root of 396911972 is about 734.9053340370.

The spelling of 396911972 in words is "three hundred ninety-six million, nine hundred eleven thousand, nine hundred seventy-two".