204830 has 8 divisors (see below), whose sum is σ = 368712. Its totient is φ = 81928.

The previous prime is 204821. The next prime is 204857. The reversal of 204830 is 38402.

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

It is a junction number, because it is equal to n+sod(n) for n = 204799 and 204808.

It is a congruent number.

It is an unprimeable number.

204830 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 3 ways as a sum of consecutive naturals, for example, 10232 + ... + 10251.

It is an arithmetic number, because the mean of its divisors is an integer number (46089).

2²⁰⁴⁸³⁰ is an apocalyptic number.

204830 is a deficient number, since it is larger than the sum of its proper divisors (163882).

204830 is a wasteful number, since it uses less digits than its factorization.

204830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20490.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204830 is about 452.5814843760. The cubic root of 204830 is about 58.9473819873.

The spelling of 204830 in words is "two hundred four thousand, eight hundred thirty".