404657872 has 20 divisors (see below), whose sum is σ = 797315040. Its totient is φ = 198899168.

The previous prime is 404657779. The next prime is 404657881. The reversal of 404657872 is 278756404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213388 + ... + 215275.

It is an arithmetic number, because the mean of its divisors is an integer number (39865752).

Almost surely, 2^404657872 is an apocalyptic number.

It is an amenable number.

404657872 is a deficient number, since it is larger than the sum of its proper divisors (392657168).

404657872 is a wasteful number, since it uses less digits than its factorization.

404657872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428730 (or 428724 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 404657872 is about 20116.1097630730. The cubic root of 404657872 is about 739.6552277540.

The spelling of 404657872 in words is "four hundred four million, six hundred fifty-seven thousand, eight hundred seventy-two".