204517290 has 16 divisors (see below), whose sum is σ = 490841568. Its totient is φ = 54537936.

The previous prime is 204517267. The next prime is 204517303. The reversal of 204517290 is 92715402.

204517290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 6817243 = 204517290 / (2 + 0 + 4 + 5 + 1 + 7 + 2 + 9 + 0).

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, 3408592 + ... + 3408651.

It is an arithmetic number, because the mean of its divisors is an integer number (30677598).

Almost surely, 2^204517290 is an apocalyptic number.

204517290 is an abundant number, since it is smaller than the sum of its proper divisors (286324278).

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

204517290 is a wasteful number, since it uses less digits than its factorization.

204517290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6817253.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 204517290 is about 14300.9541639710. The cubic root of 204517290 is about 589.1736876589.

The spelling of 204517290 in words is "two hundred four million, five hundred seventeen thousand, two hundred ninety".