404664631 has 8 divisors (see below), whose sum is σ = 462660480. Its totient is φ = 346715448.

The previous prime is 404664619. The next prime is 404664643. The reversal of 404664631 is 136466404.

It is an interprime number because it is at equal distance from previous prime (404664619) and next prime (404664643).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404664631 - 2¹⁵ = 404631863 is a prime.

It is a super-2 number, since 2×404664631² = 327506927164732322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404664661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9480 + ... + 29986.

It is an arithmetic number, because the mean of its divisors is an integer number (57832560).

Almost surely, 2^404664631 is an apocalyptic number.

404664631 is a deficient number, since it is larger than the sum of its proper divisors (57995849).

404664631 is a wasteful number, since it uses less digits than its factorization.

404664631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23333.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 404664631 is about 20116.2777620513. The cubic root of 404664631 is about 739.6593458845.

The spelling of 404664631 in words is "four hundred four million, six hundred sixty-four thousand, six hundred thirty-one".