204661290 has 16 divisors (see below), whose sum is σ = 491187168. Its totient is φ = 54576336.

The previous prime is 204661277. The next prime is 204661307. The reversal of 204661290 is 92166402.

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: 6822043 = 204661290 / (2 + 0 + 4 + 6 + 6 + 1 + 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, 3410992 + ... + 3411051.

It is an arithmetic number, because the mean of its divisors is an integer number (30699198).

Almost surely, 2^204661290 is an apocalyptic number.

204661290 is an abundant number, since it is smaller than the sum of its proper divisors (286525878).

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

204661290 is a wasteful number, since it uses less digits than its factorization.

204661290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6822053.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 204661290 is about 14305.9879071667. The cubic root of 204661290 is about 589.3119336832.

It can be divided in two parts, 2046 and 61290, that added together give a palindrome (63336).

The spelling of 204661290 in words is "two hundred four million, six hundred sixty-one thousand, two hundred ninety".