404664 has 32 divisors (see below), whose sum is σ = 1090320. Its totient is φ = 124416.

The previous prime is 404597. The next prime is 404671. The reversal of 404664 is 466404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337 + ... + 960.

2⁴⁰⁴⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

404664 is an abundant number, since it is smaller than the sum of its proper divisors (685656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404664 is a wasteful number, since it uses less digits than its factorization.

404664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 404664 is about 636.1320617608. The cubic root of 404664 is about 73.9658961430.

404664 divided by its sum of digits (24) gives a palindrome (16861).

It can be divided in two parts, 40466 and 4, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 404664 in words is "four hundred four thousand, six hundred sixty-four".