204105646 has 8 divisors (see below), whose sum is σ = 306532944. Its totient is φ = 101928000.

The previous prime is 204105641. The next prime is 204105647. The reversal of 204105646 is 646501402.

204105646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×204105646² = 83318229458154632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204105641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60355 + ... + 63646.

It is an arithmetic number, because the mean of its divisors is an integer number (38316618).

Almost surely, 2^204105646 is an apocalyptic number.

204105646 is a deficient number, since it is larger than the sum of its proper divisors (102427298).

204105646 is a wasteful number, since it uses less digits than its factorization.

204105646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124826.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 204105646 is about 14286.5547281351. The cubic root of 204105646 is about 588.7781339567.

The spelling of 204105646 in words is "two hundred four million, one hundred five thousand, six hundred forty-six".