866894 has 16 divisors (see below), whose sum is σ = 1564800. Its totient is φ = 351864.

The previous prime is 866869. The next prime is 866909. The reversal of 866894 is 498668.

It is a congruent number.

It is an unprimeable number.

866894 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, 1364 + ... + 1895.

It is an arithmetic number, because the mean of its divisors is an integer number (97800).

2⁸⁶⁶⁸⁹⁴ is an apocalyptic number.

866894 is a deficient number, since it is larger than the sum of its proper divisors (697906).

866894 is a wasteful number, since it uses less digits than its factorization.

866894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287.

The product of its digits is 82944, while the sum is 41.

The square root of 866894 is about 931.0714258316. The cubic root of 866894 is about 95.3502857796.

The spelling of 866894 in words is "eight hundred sixty-six thousand, eight hundred ninety-four".