191888 has 20 divisors (see below), whose sum is σ = 379440. Its totient is φ = 93984.

The previous prime is 191861. The next prime is 191899. The reversal of 191888 is 888191.

191888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 191888.

It is an unprimeable number.

191888 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (18972).

2¹⁹¹⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

191888 is a deficient number, since it is larger than the sum of its proper divisors (187552).

191888 is a wasteful number, since it uses less digits than its factorization.

191888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 248 counting only the distinct ones).

The product of its digits is 4608, while the sum is 35.

The square root of 191888 is about 438.0502254308. The cubic root of 191888 is about 57.6787631338.

The spelling of 191888 in words is "one hundred ninety-one thousand, eight hundred eighty-eight".