204790 has 8 divisors (see below), whose sum is σ = 368640. Its totient is φ = 81912.

The previous prime is 204781. The next prime is 204791. The reversal of 204790 is 97402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10230 + ... + 10249.

It is an arithmetic number, because the mean of its divisors is an integer number (46080).

2²⁰⁴⁷⁹⁰ is an apocalyptic number.

204790 is a deficient number, since it is larger than the sum of its proper divisors (163850).

204790 is a wasteful number, since it uses less digits than its factorization.

204790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20486.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 204790 is about 452.5372912811. The cubic root of 204790 is about 58.9435445794.

The spelling of 204790 in words is "two hundred four thousand, seven hundred ninety".