865964 has 12 divisors (see below), whose sum is σ = 1653288. Its totient is φ = 393600.

The previous prime is 865957. The next prime is 865979. The reversal of 865964 is 469568.

It is an unprimeable 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, 9797 + ... + 9884.

It is an arithmetic number, because the mean of its divisors is an integer number (137774).

2⁸⁶⁵⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

865964 is a deficient number, since it is larger than the sum of its proper divisors (787324).

865964 is a wasteful number, since it uses less digits than its factorization.

865964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19696 (or 19694 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 865964 is about 930.5718671871. The cubic root of 865964 is about 95.3161764595.

The spelling of 865964 in words is "eight hundred sixty-five thousand, nine hundred sixty-four".