204644136 has 64 divisors (see below), whose sum is σ = 545126400. Its totient is φ = 63834048.

The previous prime is 204644131. The next prime is 204644137. The reversal of 204644136 is 631446402.

It is not an unprimeable number, because it can be changed into a prime (204644131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35145 + ... + 40551.

It is an arithmetic number, because the mean of its divisors is an integer number (8517600).

Almost surely, 2^204644136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204644136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272563200).

204644136 is an abundant number, since it is smaller than the sum of its proper divisors (340482264).

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

204644136 is a wasteful number, since it uses less digits than its factorization.

204644136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518 (or 5514 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 204644136 is about 14305.3883554415. The cubic root of 204644136 is about 589.2954685286.

The spelling of 204644136 in words is "two hundred four million, six hundred forty-four thousand, one hundred thirty-six".