858966 has 16 divisors (see below), whose sum is σ = 1728000. Its totient is φ = 284648.

The previous prime is 858961. The next prime is 858989. The reversal of 858966 is 669858.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858961) by changing a digit.

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, 1135 + ... + 1733.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2⁸⁵⁸⁹⁶⁶ is an apocalyptic number.

858966 is an abundant number, since it is smaller than the sum of its proper divisors (869034).

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

858966 is a wasteful number, since it uses less digits than its factorization.

858966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843.

The product of its digits is 103680, while the sum is 42.

The square root of 858966 is about 926.8041864385. The cubic root of 858966 is about 95.0587263857.

It can be divided in two parts, 858 and 966, that multiplied together give a palindrome (828828).

The spelling of 858966 in words is "eight hundred fifty-eight thousand, nine hundred sixty-six".