204644630 has 32 divisors (see below), whose sum is σ = 394126560. Its totient is φ = 76273920.

The previous prime is 204644603. The next prime is 204644701. The reversal of 204644630 is 36446402.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204644593 and 204644602.

It is a congruent number.

It is an unprimeable 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, 2762 + ... + 20418.

It is an arithmetic number, because the mean of its divisors is an integer number (12316455).

Almost surely, 2^204644630 is an apocalyptic number.

204644630 is a deficient number, since it is larger than the sum of its proper divisors (189481930).

204644630 is a wasteful number, since it uses less digits than its factorization.

204644630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17744.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 204644630 is about 14305.4056216523. The cubic root of 204644630 is about 589.2959427041.

The spelling of 204644630 in words is "two hundred four million, six hundred forty-four thousand, six hundred thirty".