289866 has 8 divisors (see below), whose sum is σ = 579744. Its totient is φ = 96620.

The previous prime is 289859. The next prime is 289871. The reversal of 289866 is 668982.

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

289866 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289866.

It is an unprimeable number.

289866 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, 24150 + ... + 24161.

It is an arithmetic number, because the mean of its divisors is an integer number (72468).

2²⁸⁹⁸⁶⁶ is an apocalyptic number.

289866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

289866 is a wasteful number, since it uses less digits than its factorization.

289866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48316.

The product of its digits is 41472, while the sum is 39.

The square root of 289866 is about 538.3920504614. The cubic root of 289866 is about 66.1808629648.

The spelling of 289866 in words is "two hundred eighty-nine thousand, eight hundred sixty-six".