404442464 has 12 divisors (see below), whose sum is σ = 796246164. Its totient is φ = 202221216.

The previous prime is 404442421. The next prime is 404442469. The reversal of 404442464 is 464244404.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 12638827 = 404442464 / (4 + 0 + 4 + 4 + 4 + 2 + 4 + 6 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 404442464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404442469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319382 + ... + 6319445.

It is an arithmetic number, because the mean of its divisors is an integer number (66353847).

Almost surely, 2^404442464 is an apocalyptic number.

It is an amenable number.

404442464 is a deficient number, since it is larger than the sum of its proper divisors (391803700).

404442464 is a wasteful number, since it uses less digits than its factorization.

404442464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12638837 (or 12638829 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

The square root of 404442464 is about 20110.7549336170. The cubic root of 404442464 is about 739.5239597176.

Adding to 404442464 its reverse (464244404), we get a palindrome (868686868).

The spelling of 404442464 in words is "four hundred four million, four hundred forty-two thousand, four hundred sixty-four".