404252631 has 6 divisors (see below), whose sum is σ = 583920480. Its totient is φ = 269501748.

The previous prime is 404252627. The next prime is 404252647. The reversal of 404252631 is 136252404.

404252631 is a `hidden beast` number, since 4 + 0 + 4 + 25 + 2 + 631 = 666.

It is not a de Polignac number, because 404252631 - 2² = 404252627 is a prime.

It is a super-2 number, since 2×404252631² = 326840379340844322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 404252595 and 404252604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404252131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22458471 + ... + 22458488.

It is an arithmetic number, because the mean of its divisors is an integer number (97320080).

Almost surely, 2^404252631 is an apocalyptic number.

404252631 is a deficient number, since it is larger than the sum of its proper divisors (179667849).

404252631 is a wasteful number, since it uses less digits than its factorization.

404252631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44916965 (or 44916962 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 404252631 is about 20106.0346911070. The cubic root of 404252631 is about 739.4082382538.

The spelling of 404252631 in words is "four hundred four million, two hundred fifty-two thousand, six hundred thirty-one".