204890290 has 32 divisors (see below), whose sum is σ = 426000384. Its totient is φ = 70122240.

The previous prime is 204890267. The next prime is 204890291. The reversal of 204890290 is 92098402.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (204890291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52914 + ... + 56653.

It is an arithmetic number, because the mean of its divisors is an integer number (13312512).

Almost surely, 2^204890290 is an apocalyptic number.

204890290 is an abundant number, since it is smaller than the sum of its proper divisors (221110094).

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

204890290 is a wasteful number, since it uses less digits than its factorization.

204890290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109602.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 204890290 is about 14313.9893111599. The cubic root of 204890290 is about 589.5316497652.

The spelling of 204890290 in words is "two hundred four million, eight hundred ninety thousand, two hundred ninety".