188505228 has 12 divisors (see below), whose sum is σ = 439845560. Its totient is φ = 62835072.

The previous prime is 188505227. The next prime is 188505253. The reversal of 188505228 is 822505881.

188505228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (188505221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7854373 + ... + 7854396.

Almost surely, 2^188505228 is an apocalyptic number.

It is an amenable number.

188505228 is an abundant number, since it is smaller than the sum of its proper divisors (251340332).

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

188505228 is a wasteful number, since it uses less digits than its factorization.

188505228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15708776 (or 15708774 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 39.

The square root of 188505228 is about 13729.7206089563. The cubic root of 188505228 is about 573.3781421922.

The spelling of 188505228 in words is "one hundred eighty-eight million, five hundred five thousand, two hundred twenty-eight".