205012188 has 48 divisors (see below), whose sum is σ = 534240000. Its totient is φ = 67986864.

The previous prime is 205012141. The next prime is 205012217. The reversal of 205012188 is 881210502.

205012188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16723 + ... + 26261.

It is an arithmetic number, because the mean of its divisors is an integer number (11130000).

Almost surely, 2^205012188 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 205012188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267120000).

205012188 is an abundant number, since it is smaller than the sum of its proper divisors (329227812).

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

205012188 is a wasteful number, since it uses less digits than its factorization.

205012188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751 (or 9743 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 205012188 is about 14318.2466803726. The cubic root of 205012188 is about 589.6485391215.

The spelling of 205012188 in words is "two hundred five million, twelve thousand, one hundred eighty-eight".