397843144 has 16 divisors (see below), whose sum is σ = 778389120. Its totient is φ = 190272720.

The previous prime is 397843139. The next prime is 397843169. The reversal of 397843144 is 441348793.

It is a self number, because there is not a number n which added to its sum of digits gives 397843144.

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, 1080912 + ... + 1081279.

It is an arithmetic number, because the mean of its divisors is an integer number (48649320).

Almost surely, 2^397843144 is an apocalyptic number.

It is an amenable number.

397843144 is a deficient number, since it is larger than the sum of its proper divisors (380545976).

397843144 is a wasteful number, since it uses less digits than its factorization.

397843144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162220 (or 2162216 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 397843144 is about 19946.0057154308. The cubic root of 397843144 is about 735.4795913569.

The spelling of 397843144 in words is "three hundred ninety-seven million, eight hundred forty-three thousand, one hundred forty-four".