397187268 has 12 divisors (see below), whose sum is σ = 926770320. Its totient is φ = 132395752.

The previous prime is 397187251. The next prime is 397187281. The reversal of 397187268 is 862781793.

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

It is a super-2 number, since 2×397187268² = 315515451722607648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 397187268.

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, 16549458 + ... + 16549481.

It is an arithmetic number, because the mean of its divisors is an integer number (77230860).

Almost surely, 2^397187268 is an apocalyptic number.

It is an amenable number.

397187268 is an abundant number, since it is smaller than the sum of its proper divisors (529583052).

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

397187268 is a wasteful number, since it uses less digits than its factorization.

397187268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33098946 (or 33098944 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 51.

The square root of 397187268 is about 19929.5576468721. The cubic root of 397187268 is about 735.0752035596.

The spelling of 397187268 in words is "three hundred ninety-seven million, one hundred eighty-seven thousand, two hundred sixty-eight".