204205290 has 32 divisors (see below), whose sum is σ = 499343616. Its totient is φ = 53426880.

The previous prime is 204205223. The next prime is 204205291. The reversal of 204205290 is 92502402.

It is a self number, because there is not a number n which added to its sum of digits gives 204205290.

It is not an unprimeable number, because it can be changed into a prime (204205291) 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, 62626 + ... + 65805.

It is an arithmetic number, because the mean of its divisors is an integer number (15604488).

Almost surely, 2^204205290 is an apocalyptic number.

204205290 is an abundant number, since it is smaller than the sum of its proper divisors (295138326).

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

204205290 is a wasteful number, since it uses less digits than its factorization.

204205290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128494.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 204205290 is about 14290.0416374481. The cubic root of 204205290 is about 588.8739318353.

Adding to 204205290 its reverse (92502402), we get a palindrome (296707692).

The spelling of 204205290 in words is "two hundred four million, two hundred five thousand, two hundred ninety".