204090 has 16 divisors (see below), whose sum is σ = 489888. Its totient is φ = 54416.

The previous prime is 204067. The next prime is 204101. The reversal of 204090 is 90402.

204090 is digitally balanced in base 3, 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 (15).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 204090.

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, 3372 + ... + 3431.

It is an arithmetic number, because the mean of its divisors is an integer number (30618).

2²⁰⁴⁰⁹⁰ is an apocalyptic number.

204090 is an abundant number, since it is smaller than the sum of its proper divisors (285798).

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

204090 is a wasteful number, since it uses less digits than its factorization.

204090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 204090 is about 451.7632123137. The cubic root of 204090 is about 58.8763089039.

Adding to 204090 its reverse (90402), we get a palindrome (294492).

The spelling of 204090 in words is "two hundred four thousand, ninety".