188855090 has 8 divisors (see below), whose sum is σ = 339939180. Its totient is φ = 75542032.

The previous prime is 188855089. The next prime is 188855099. The reversal of 188855090 is 90558881.

It can be written as a sum of positive squares in 2 ways, for example, as 188320729 + 534361 = 13723^2 + 731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (188855099) 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, 9442745 + ... + 9442764.

Almost surely, 2^188855090 is an apocalyptic number.

188855090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188855090 is a deficient number, since it is larger than the sum of its proper divisors (151084090).

188855090 is a wasteful number, since it uses less digits than its factorization.

188855090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18885516.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 188855090 is about 13742.4557485189. The cubic root of 188855090 is about 573.7326491526.

The spelling of 188855090 in words is "one hundred eighty-eight million, eight hundred fifty-five thousand, ninety".