397456838 has 16 divisors (see below), whose sum is σ = 632777184. Its totient is φ = 186587520.

The previous prime is 397456811. The next prime is 397456841. The reversal of 397456838 is 838654793.

It is a self number, because there is not a number n which added to its sum of digits gives 397456838.

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, 431 + ... + 28197.

It is an arithmetic number, because the mean of its divisors is an integer number (39548574).

Almost surely, 2^397456838 is an apocalyptic number.

397456838 is a deficient number, since it is larger than the sum of its proper divisors (235320346).

397456838 is a wasteful number, since it uses less digits than its factorization.

397456838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28207.

The product of its digits is 4354560, while the sum is 53.

The square root of 397456838 is about 19936.3195700711. The cubic root of 397456838 is about 735.2414638492.

The spelling of 397456838 in words is "three hundred ninety-seven million, four hundred fifty-six thousand, eight hundred thirty-eight".