204988668 has 24 divisors (see below), whose sum is σ = 482076672. Its totient is φ = 67791024.

The previous prime is 204988661. The next prime is 204988681. The reversal of 204988668 is 866889402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 204988668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204988661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65730 + ... + 68777.

It is an arithmetic number, because the mean of its divisors is an integer number (20086528).

Almost surely, 2^204988668 is an apocalyptic number.

It is an amenable number.

204988668 is an abundant number, since it is smaller than the sum of its proper divisors (277088004).

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

204988668 is a wasteful number, since it uses less digits than its factorization.

204988668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134641 (or 134639 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The square root of 204988668 is about 14317.4253272018. The cubic root of 204988668 is about 589.6259891386.

The spelling of 204988668 in words is "two hundred four million, nine hundred eighty-eight thousand, six hundred sixty-eight".