204630 has 32 divisors (see below), whose sum is σ = 518400. Its totient is φ = 51552.

The previous prime is 204623. The next prime is 204641. The reversal of 204630 is 36402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

204630 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391 + ... + 749.

It is an arithmetic number, because the mean of its divisors is an integer number (16200).

2²⁰⁴⁶³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259200).

204630 is an abundant number, since it is smaller than the sum of its proper divisors (313770).

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

204630 is a wasteful number, since it uses less digits than its factorization.

204630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 204630 is about 452.3604757270. The cubic root of 204630 is about 58.9281899490.

The spelling of 204630 in words is "two hundred four thousand, six hundred thirty".