204040404 has 48 divisors (see below), whose sum is σ = 547243200. Its totient is φ = 65667168.

The previous prime is 204040399. The next prime is 204040423. The reversal of 204040404 is 404040402.

It is a happy number.

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

204040404 is a modest number, since divided by 40404 gives 204 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29442 + ... + 35705.

It is an arithmetic number, because the mean of its divisors is an integer number (11400900).

Almost surely, 2^204040404 is an apocalyptic number.

It is an amenable number.

204040404 is an abundant number, since it is smaller than the sum of its proper divisors (343202796).

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

204040404 is a wasteful number, since it uses less digits than its factorization.

204040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65189 (or 65181 counting only the distinct ones).

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

The square root of 204040404 is about 14284.2712099708. The cubic root of 204040404 is about 588.7153933166.

Adding to 204040404 its reverse (404040402), we get a palindrome (608080806).

The spelling of 204040404 in words is "two hundred four million, forty thousand, four hundred four".