204644406 has 8 divisors (see below), whose sum is σ = 409288824. Its totient is φ = 68214800.

The previous prime is 204644399. The next prime is 204644413. The reversal of 204644406 is 604446402.

It is an interprime number because it is at equal distance from previous prime (204644399) and next prime (204644413).

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

204644406 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 17053695 + ... + 17053706.

It is an arithmetic number, because the mean of its divisors is an integer number (51161103).

Almost surely, 2^204644406 is an apocalyptic number.

204644406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

204644406 is a wasteful number, since it uses less digits than its factorization.

204644406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34107406.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 204644406 is about 14305.3977924418. The cubic root of 204644406 is about 589.2957276934.

The spelling of 204644406 in words is "two hundred four million, six hundred forty-four thousand, four hundred six".