204040440400 has 60 divisors (see below), whose sum is σ = 490652649792. Its totient is φ = 81542005120.

The previous prime is 204040440379. The next prime is 204040440493. The reversal of 204040440400 is 4044040402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209967 + ... + 672433.

Almost surely, 2^204040440400 is an apocalyptic number.

204040440400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204040440400 is an abundant number, since it is smaller than the sum of its proper divisors (286612209392).

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

204040440400 is a wasteful number, since it uses less digits than its factorization.

204040440400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463588 (or 463577 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 204040440400 its reverse (4044040402), we get a palindrome (208084480802).

The spelling of 204040440400 in words is "two hundred four billion, forty million, four hundred forty thousand, four hundred".