404402004 has 48 divisors (see below), whose sum is σ = 1103636800. Its totient is φ = 127705248.

The previous prime is 404402003. The next prime is 404402039. The reversal of 404402004 is 400204404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404402003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96487 + ... + 100590.

Almost surely, 2^404402004 is an apocalyptic number.

It is an amenable number.

404402004 is an abundant number, since it is smaller than the sum of its proper divisors (699234796).

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

404402004 is a wasteful number, since it uses less digits than its factorization.

404402004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197109 (or 197101 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 404402004 is about 20109.7489790400. The cubic root of 404402004 is about 739.4992984947.

Adding to 404402004 its reverse (400204404), we get a palindrome (804606408).

It can be divided in two parts, 40 and 4402004, that added together give a palindrome (4402044).

The spelling of 404402004 in words is "four hundred four million, four hundred two thousand, four".