204420644 has 12 divisors (see below), whose sum is σ = 362775168. Its totient is φ = 100770600.

The previous prime is 204420589. The next prime is 204420649. The reversal of 204420644 is 446024402.

It is not an unprimeable number, because it can be changed into a prime (204420649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359612 + ... + 360179.

It is an arithmetic number, because the mean of its divisors is an integer number (30231264).

Almost surely, 2^204420644 is an apocalyptic number.

It is an amenable number.

204420644 is a deficient number, since it is larger than the sum of its proper divisors (158354524).

204420644 is a wasteful number, since it uses less digits than its factorization.

204420644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719866 (or 719864 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 204420644 is about 14297.5747593779. The cubic root of 204420644 is about 589.0808670602.

The spelling of 204420644 in words is "two hundred four million, four hundred twenty thousand, six hundred forty-four".