204430664 has 8 divisors (see below), whose sum is σ = 383307510. Its totient is φ = 102215328.

The previous prime is 204430663. The next prime is 204430679. The reversal of 204430664 is 466034402.

It is a happy number.

204430664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 147428164 + 57002500 = 12142^2 + 7550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (204430663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776909 + ... + 12776924.

Almost surely, 2^204430664 is an apocalyptic number.

It is an amenable number.

204430664 is a deficient number, since it is larger than the sum of its proper divisors (178876846).

204430664 is a wasteful number, since it uses less digits than its factorization.

204430664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25553839 (or 25553835 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 204430664 is about 14297.9251641628. The cubic root of 204430664 is about 589.0904918120.

The spelling of 204430664 in words is "two hundred four million, four hundred thirty thousand, six hundred sixty-four".