397628772 has 12 divisors (see below), whose sum is σ = 927800496. Its totient is φ = 132542920.

The previous prime is 397628741. The next prime is 397628801. The reversal of 397628772 is 277826793.

It is a tau number, because it is divible by the number of its divisors (12).

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, 16567854 + ... + 16567877.

It is an arithmetic number, because the mean of its divisors is an integer number (77316708).

Almost surely, 2^397628772 is an apocalyptic number.

It is an amenable number.

397628772 is an abundant number, since it is smaller than the sum of its proper divisors (530171724).

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

397628772 is a wasteful number, since it uses less digits than its factorization.

397628772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33135738 (or 33135736 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 51.

The square root of 397628772 is about 19940.6311835910. The cubic root of 397628772 is about 735.3474667909.

The spelling of 397628772 in words is "three hundred ninety-seven million, six hundred twenty-eight thousand, seven hundred seventy-two".