397924772 has 12 divisors (see below), whose sum is σ = 795849600. Its totient is φ = 170539176.

The previous prime is 397924757. The next prime is 397924781. The reversal of 397924772 is 277429793.

397924772 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 397924772.

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, 7105772 + ... + 7105827.

It is an arithmetic number, because the mean of its divisors is an integer number (66320800).

Almost surely, 2^397924772 is an apocalyptic number.

It is an amenable number.

397924772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

397924772 is a wasteful number, since it uses less digits than its factorization.

397924772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14211610 (or 14211608 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 50.

The square root of 397924772 is about 19948.0518347031. The cubic root of 397924772 is about 735.5298889206.

The spelling of 397924772 in words is "three hundred ninety-seven million, nine hundred twenty-four thousand, seven hundred seventy-two".