866982 has 8 divisors (see below), whose sum is σ = 1733976. Its totient is φ = 288992.

The previous prime is 866969. The next prime is 867001. The reversal of 866982 is 289668.

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

866982 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 866982.

It is a congruent number.

It is an unprimeable number.

866982 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 3 ways as a sum of consecutive naturals, for example, 72243 + ... + 72254.

It is an arithmetic number, because the mean of its divisors is an integer number (216747).

2⁸⁶⁶⁹⁸² is an apocalyptic number.

866982 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.

866982 is a wasteful number, since it uses less digits than its factorization.

866982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144502.

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

The square root of 866982 is about 931.1186820164. The cubic root of 866982 is about 95.3535120646.

The spelling of 866982 in words is "eight hundred sixty-six thousand, nine hundred eighty-two".