404002664 has 32 divisors (see below), whose sum is σ = 842096640. Its totient is φ = 180446400.

The previous prime is 404002663. The next prime is 404002691. The reversal of 404002664 is 466200404.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (404002663) 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, 59432 + ... + 65879.

It is an arithmetic number, because the mean of its divisors is an integer number (26315520).

Almost surely, 2^404002664 is an apocalyptic number.

It is an amenable number.

404002664 is an abundant number, since it is smaller than the sum of its proper divisors (438093976).

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

404002664 is a wasteful number, since it uses less digits than its factorization.

404002664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125361 (or 125357 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 404002664 is about 20099.8175116094. The cubic root of 404002664 is about 739.2558040631.

The spelling of 404002664 in words is "four hundred four million, two thousand, six hundred sixty-four".