204645606 has 48 divisors (see below), whose sum is σ = 457356144. Its totient is φ = 60984000.

The previous prime is 204645593. The next prime is 204645611. The reversal of 204645606 is 606546402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41976 + ... + 46596.

It is an arithmetic number, because the mean of its divisors is an integer number (9528253).

Almost surely, 2^204645606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204645606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228678072).

204645606 is an abundant number, since it is smaller than the sum of its proper divisors (252710538).

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

204645606 is a wasteful number, since it uses less digits than its factorization.

204645606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709 (or 4698 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 204645606 is about 14305.4397345905. The cubic root of 204645606 is about 589.2968795345.

The spelling of 204645606 in words is "two hundred four million, six hundred forty-five thousand, six hundred six".