204290 has 16 divisors (see below), whose sum is σ = 380160. Its totient is φ = 78960.

The previous prime is 204251. The next prime is 204299. The reversal of 204290 is 92402.

It is not an unprimeable number, because it can be changed into a prime (204299) by changing a digit.

204290 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20 + ... + 639.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2²⁰⁴²⁹⁰ is an apocalyptic number.

204290 is a deficient number, since it is larger than the sum of its proper divisors (175870).

204290 is a wasteful number, since it uses less digits than its factorization.

204290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 204290 is about 451.9845130090. The cubic root of 204290 is about 58.8955347641.

Multiplying 204290 by its sum of digits (17), we get a triangular number (3472930 = T₂₆₃₅).

Adding to 204290 its reverse (92402), we get a palindrome (296692).

It can be divided in two parts, 204 and 290, that added together give a palindrome (494).

The spelling of 204290 in words is "two hundred four thousand, two hundred ninety".