204690 has 16 divisors (see below), whose sum is σ = 491328. Its totient is φ = 54576.

The previous prime is 204679. The next prime is 204707. The reversal of 204690 is 96402.

It is a super-2 number, since 2×204690² = 83795992200, which contains 22 as substring.

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, 3382 + ... + 3441.

It is an arithmetic number, because the mean of its divisors is an integer number (30708).

2²⁰⁴⁶⁹⁰ is an apocalyptic number.

204690 is an abundant number, since it is smaller than the sum of its proper divisors (286638).

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

204690 is a wasteful number, since it uses less digits than its factorization.

204690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6833.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 204690 is about 452.4267896577. The cubic root of 204690 is about 58.9339488730.

The spelling of 204690 in words is "two hundred four thousand, six hundred ninety".