204440664 has 32 divisors (see below), whose sum is σ = 519768000. Its totient is φ = 66991392.

The previous prime is 204440641. The next prime is 204440671. The reversal of 204440664 is 466044402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70774 + ... + 73605.

It is an arithmetic number, because the mean of its divisors is an integer number (16242750).

Almost surely, 2^204440664 is an apocalyptic number.

204440664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

204440664 is an abundant number, since it is smaller than the sum of its proper divisors (315327336).

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

204440664 is a wasteful number, since it uses less digits than its factorization.

204440664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144447 (or 144443 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 204440664 is about 14298.2748609754. The cubic root of 204440664 is about 589.1000970391.

The spelling of 204440664 in words is "two hundred four million, four hundred forty thousand, six hundred sixty-four".