404641264 has 20 divisors (see below), whose sum is σ = 809283520. Its totient is φ = 195793920.

The previous prime is 404641253. The next prime is 404641297. The reversal of 404641264 is 462146404.

404641264 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 407409 + ... + 408400.

It is an arithmetic number, because the mean of its divisors is an integer number (40464176).

Almost surely, 2^404641264 is an apocalyptic number.

It is an amenable number.

404641264 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

404641264 is a wasteful number, since it uses less digits than its factorization.

404641264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815848 (or 815842 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 404641264 is about 20115.6969553630. The cubic root of 404641264 is about 739.6451086197.

Adding to 404641264 its reverse (462146404), we get a palindrome (866787668).

The spelling of 404641264 in words is "four hundred four million, six hundred forty-one thousand, two hundred sixty-four".