404090931 has 16 divisors (see below), whose sum is σ = 545529600. Its totient is φ = 266044128.

The previous prime is 404090903. The next prime is 404090963. The reversal of 404090931 is 139090404.

It is not a de Polignac number, because 404090931 - 2¹⁵ = 404058163 is a prime.

It is a super-2 number, since 2×404090931² = 326578961032893522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404010931) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 79690 + ... + 84608.

It is an arithmetic number, because the mean of its divisors is an integer number (34095600).

Almost surely, 2^404090931 is an apocalyptic number.

404090931 is a deficient number, since it is larger than the sum of its proper divisors (141438669).

404090931 is a wasteful number, since it uses less digits than its factorization.

404090931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 404090931 is about 20102.0131081442. The cubic root of 404090931 is about 739.3096379825.

The spelling of 404090931 in words is "four hundred four million, ninety thousand, nine hundred thirty-one".