397565756 has 24 divisors (see below), whose sum is σ = 822551520. Its totient is φ = 164509632.

The previous prime is 397565737. The next prime is 397565771. The reversal of 397565756 is 657565793.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 397565698 and 397565707.

It is a congruent number.

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, 243995 + ... + 245618.

It is an arithmetic number, because the mean of its divisors is an integer number (34272980).

Almost surely, 2^397565756 is an apocalyptic number.

It is an amenable number.

397565756 is an abundant number, since it is smaller than the sum of its proper divisors (424985764).

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

397565756 is a wasteful number, since it uses less digits than its factorization.

397565756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489653 (or 489651 counting only the distinct ones).

The product of its digits is 5953500, while the sum is 53.

The square root of 397565756 is about 19939.0510305782. The cubic root of 397565756 is about 735.3086189112.

The spelling of 397565756 in words is "three hundred ninety-seven million, five hundred sixty-five thousand, seven hundred fifty-six".