404931 has 12 divisors (see below), whose sum is σ = 560328. Its totient is φ = 260064.

The previous prime is 404851. The next prime is 404941. The reversal of 404931 is 139404.

It is not a de Polignac number, because 404931 - 2⁹ = 404419 is a prime.

It is a super-2 number, since 2×404931² = 327938229522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 404898 and 404907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5511 + ... + 5583.

It is an arithmetic number, because the mean of its divisors is an integer number (46694).

2⁴⁰⁴⁹³¹ is an apocalyptic number.

404931 is a deficient number, since it is larger than the sum of its proper divisors (155397).

404931 is an equidigital number, since it uses as much as digits as its factorization.

404931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 404931 is about 636.3418892388. The cubic root of 404931 is about 73.9821602966.

The spelling of 404931 in words is "four hundred four thousand, nine hundred thirty-one".