204864290 has 16 divisors (see below), whose sum is σ = 377750520. Its totient is φ = 79946880.

The previous prime is 204864287. The next prime is 204864311. The reversal of 204864290 is 92468402.

It can be written as a sum of positive squares in 4 ways, for example, as 48038761 + 156825529 = 6931^2 + 12523^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204864290.

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, 249425 + ... + 250244.

Almost surely, 2^204864290 is an apocalyptic number.

204864290 is a deficient number, since it is larger than the sum of its proper divisors (172886230).

204864290 is a wasteful number, since it uses less digits than its factorization.

204864290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499717.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 204864290 is about 14313.0810799073. The cubic root of 204864290 is about 589.5067120757.

The spelling of 204864290 in words is "two hundred four million, eight hundred sixty-four thousand, two hundred ninety".