208866 has 16 divisors (see below), whose sum is σ = 477504. Its totient is φ = 59664.

The previous prime is 208843. The next prime is 208877. The reversal of 208866 is 668802.

It is a Curzon number.

It is an unprimeable number.

208866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445 + ... + 2528.

It is an arithmetic number, because the mean of its divisors is an integer number (29844).

2²⁰⁸⁸⁶⁶ is an apocalyptic number.

208866 is an abundant number, since it is smaller than the sum of its proper divisors (268638).

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

208866 is a wasteful number, since it uses less digits than its factorization.

208866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4985.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 208866 is about 457.0185991839. The cubic root of 208866 is about 59.3320357696.

It can be divided in two parts, 20886 and 6, that multiplied together give a square (125316 = 354²).

The spelling of 208866 in words is "two hundred eight thousand, eight hundred sixty-six".