397877924 has 12 divisors (see below), whose sum is σ = 696450048. Its totient is φ = 198892200.

The previous prime is 397877873. The next prime is 397877927. The reversal of 397877924 is 429778793.

It is a self number, because there is not a number n which added to its sum of digits gives 397877924.

It is not an unprimeable number, because it can be changed into a prime (397877927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13469 + ... + 31259.

It is an arithmetic number, because the mean of its divisors is an integer number (58037504).

Almost surely, 2^397877924 is an apocalyptic number.

It is an amenable number.

397877924 is a deficient number, since it is larger than the sum of its proper divisors (298572124).

397877924 is a wasteful number, since it uses less digits than its factorization.

397877924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23386 (or 23384 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 56.

The square root of 397877924 is about 19946.8775501330. The cubic root of 397877924 is about 735.5010229480.

The spelling of 397877924 in words is "three hundred ninety-seven million, eight hundred seventy-seven thousand, nine hundred twenty-four".