188890195 has 16 divisors (see below), whose sum is σ = 252524160. Its totient is φ = 134676864.

The previous prime is 188890159. The next prime is 188890199. The reversal of 188890195 is 591098881.

It is a cyclic number.

It is not a de Polignac number, because 188890195 - 2¹⁹ = 188365907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188890199) 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, 48219 + ... + 51988.

It is an arithmetic number, because the mean of its divisors is an integer number (15782760).

Almost surely, 2^188890195 is an apocalyptic number.

188890195 is a deficient number, since it is larger than the sum of its proper divisors (63633965).

188890195 is a wasteful number, since it uses less digits than its factorization.

188890195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100254.

The product of its (nonzero) digits is 207360, while the sum is 49.

The square root of 188890195 is about 13743.7329354146. The cubic root of 188890195 is about 573.7681960488.

The spelling of 188890195 in words is "one hundred eighty-eight million, eight hundred ninety thousand, one hundred ninety-five".