397888736 has 24 divisors (see below), whose sum is σ = 895250160. Its totient is φ = 170523648.

The previous prime is 397888727. The next prime is 397888801. The reversal of 397888736 is 637888793.

It is a congruent number.

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, 887921 + ... + 888368.

It is an arithmetic number, because the mean of its divisors is an integer number (37302090).

Almost surely, 2^397888736 is an apocalyptic number.

It is an amenable number.

397888736 is an abundant number, since it is smaller than the sum of its proper divisors (497361424).

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

397888736 is a wasteful number, since it uses less digits than its factorization.

397888736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776306 (or 1776298 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 59.

The square root of 397888736 is about 19947.1485681538. The cubic root of 397888736 is about 735.5076850962.

The spelling of 397888736 in words is "three hundred ninety-seven million, eight hundred eighty-eight thousand, seven hundred thirty-six".