204220644 has 12 divisors (see below), whose sum is σ = 476514864. Its totient is φ = 68073544.

The previous prime is 204220613. The next prime is 204220663. The reversal of 204220644 is 446022402.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8509182 + ... + 8509205.

It is an arithmetic number, because the mean of its divisors is an integer number (39709572).

Almost surely, 2^204220644 is an apocalyptic number.

It is an amenable number.

204220644 is an abundant number, since it is smaller than the sum of its proper divisors (272294220).

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

204220644 is a wasteful number, since it uses less digits than its factorization.

204220644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17018394 (or 17018392 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 204220644 is about 14290.5788546161. The cubic root of 204220644 is about 588.8886904209. Note that the first 3 decimals are identical.

The spelling of 204220644 in words is "two hundred four million, two hundred twenty thousand, six hundred forty-four".