408685668 has 48 divisors (see below), whose sum is σ = 1005385920. Its totient is φ = 128853504.

The previous prime is 408685657. The next prime is 408685681. The reversal of 408685668 is 866586804.

It is a self number, because there is not a number n which added to its sum of digits gives 408685668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212680 + ... + 214592.

It is an arithmetic number, because the mean of its divisors is an integer number (20945540).

Almost surely, 2^408685668 is an apocalyptic number.

It is an amenable number.

408685668 is an abundant number, since it is smaller than the sum of its proper divisors (596700252).

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

408685668 is a wasteful number, since it uses less digits than its factorization.

408685668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876 (or 2874 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The square root of 408685668 is about 20215.9755638950. The cubic root of 408685668 is about 742.1012036142.

The spelling of 408685668 in words is "four hundred eight million, six hundred eighty-five thousand, six hundred sixty-eight".