190866 has 16 divisors (see below), whose sum is σ = 411264. Its totient is φ = 58704.

The previous prime is 190843. The next prime is 190871. The reversal of 190866 is 668091.

190866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

190866 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 7 ways as a sum of consecutive naturals, for example, 1146 + ... + 1301.

It is an arithmetic number, because the mean of its divisors is an integer number (25704).

2¹⁹⁰⁸⁶⁶ is an apocalyptic number.

190866 is an abundant number, since it is smaller than the sum of its proper divisors (220398).

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

190866 is a wasteful number, since it uses less digits than its factorization.

190866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 190866 is about 436.8821351349. The cubic root of 190866 is about 57.5761813170.

The spelling of 190866 in words is "one hundred ninety thousand, eight hundred sixty-six".