397136868 has 24 divisors (see below), whose sum is σ = 937067040. Its totient is φ = 130891200.

The previous prime is 397136851. The next prime is 397136903. The reversal of 397136868 is 868631793.

It is a self number, because there is not a number n which added to its sum of digits gives 397136868.

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, 184858 + ... + 186993.

It is an arithmetic number, because the mean of its divisors is an integer number (39044460).

Almost surely, 2^397136868 is an apocalyptic number.

It is an amenable number.

397136868 is an abundant number, since it is smaller than the sum of its proper divisors (539930172).

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

397136868 is a wasteful number, since it uses less digits than its factorization.

397136868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371947 (or 371945 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 397136868 is about 19928.2931532031. The cubic root of 397136868 is about 735.0441104537.

The spelling of 397136868 in words is "three hundred ninety-seven million, one hundred thirty-six thousand, eight hundred sixty-eight".