404123031 has 48 divisors (see below), whose sum is σ = 669614400. Its totient is φ = 232657920.

The previous prime is 404123023. The next prime is 404123063. The reversal of 404123031 is 130321404.

404123031 is a `hidden beast` number, since 404 + 1 + 230 + 31 = 666.

It is not a de Polignac number, because 404123031 - 2³ = 404123023 is a prime.

It is a super-2 number, since 2×404123031² = 326630848369253922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 404122995 and 404123013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404123081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 395301 + ... + 396321.

It is an arithmetic number, because the mean of its divisors is an integer number (13950300).

Almost surely, 2^404123031 is an apocalyptic number.

404123031 is a deficient number, since it is larger than the sum of its proper divisors (265491369).

404123031 is a wasteful number, since it uses less digits than its factorization.

404123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 404123031 is about 20102.8115197850. The cubic root of 404123031 is about 739.3292137835.

Adding to 404123031 its reverse (130321404), we get a palindrome (534444435).

It can be divided in two parts, 4041 and 23031, that added together give a palindrome (27072).

The spelling of 404123031 in words is "four hundred four million, one hundred twenty-three thousand, thirty-one".