404490172 has 24 divisors (see below), whose sum is σ = 713493200. Its totient is φ = 200641536.

The previous prime is 404490161. The next prime is 404490187. The reversal of 404490172 is 271094404.

It is a super-2 number, since 2×404490172² = 327224598489179168, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 546979 + ... + 547717.

Almost surely, 2^404490172 is an apocalyptic number.

It is an amenable number.

404490172 is a deficient number, since it is larger than the sum of its proper divisors (309003028).

404490172 is a wasteful number, since it uses less digits than its factorization.

404490172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1643 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 404490172 is about 20111.9410301443. The cubic root of 404490172 is about 739.5530366362.

The spelling of 404490172 in words is "four hundred four million, four hundred ninety thousand, one hundred seventy-two".