204240404 has 24 divisors (see below), whose sum is σ = 363283200. Its totient is φ = 100457280.

The previous prime is 204240403. The next prime is 204240433. The reversal of 204240404 is 404042402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204240403) 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, 73757 + ... + 76475.

It is an arithmetic number, because the mean of its divisors is an integer number (15136800).

Almost surely, 2^204240404 is an apocalyptic number.

It is an amenable number.

204240404 is a deficient number, since it is larger than the sum of its proper divisors (159042796).

204240404 is a wasteful number, since it uses less digits than its factorization.

204240404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 204240404 is about 14291.2702024698. The cubic root of 204240404 is about 588.9076830572.

Adding to 204240404 its reverse (404042402), we get a palindrome (608282806).

It can be divided in two parts, 20 and 4240404, that added together give a palindrome (4240424).

The spelling of 204240404 in words is "two hundred four million, two hundred forty thousand, four hundred four".