204115188 has 12 divisors (see below), whose sum is σ = 476268800. Its totient is φ = 68038392.

The previous prime is 204115183. The next prime is 204115189. The reversal of 204115188 is 881511402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204115183) 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 3 ways as a sum of consecutive naturals, for example, 8504788 + ... + 8504811.

Almost surely, 2^204115188 is an apocalyptic number.

It is an amenable number.

204115188 is an abundant number, since it is smaller than the sum of its proper divisors (272153612).

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

204115188 is a wasteful number, since it uses less digits than its factorization.

204115188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17009606 (or 17009604 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 204115188 is about 14286.8886745855. Note that the first 3 decimals coincide. The cubic root of 204115188 is about 588.7873089983.

The spelling of 204115188 in words is "two hundred four million, one hundred fifteen thousand, one hundred eighty-eight".