408664 has 16 divisors (see below), whose sum is σ = 799920. Its totient is φ = 195360.

The previous prime is 408659. The next prime is 408677. The reversal of 408664 is 466804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927 + ... + 1294.

It is an arithmetic number, because the mean of its divisors is an integer number (49995).

2⁴⁰⁸⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

408664 is a deficient number, since it is larger than the sum of its proper divisors (391256).

408664 is a wasteful number, since it uses less digits than its factorization.

408664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250 (or 2246 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 408664 is about 639.2683317669. The cubic root of 408664 is about 74.2088088292.

The spelling of 408664 in words is "four hundred eight thousand, six hundred sixty-four".