865344 has 28 divisors (see below), whose sum is σ = 2290064. Its totient is φ = 288384.

The previous prime is 865343. The next prime is 865349. The reversal of 865344 is 443568.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 865344.

It is not an unprimeable number, because it can be changed into a prime (865343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062 + ... + 2445.

It is an arithmetic number, because the mean of its divisors is an integer number (81788).

2⁸⁶⁵³⁴⁴ is an apocalyptic number.

It is an amenable number.

865344 is an abundant number, since it is smaller than the sum of its proper divisors (1424720).

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

865344 is a wasteful number, since it uses less digits than its factorization.

865344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522 (or 4512 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 865344 is about 930.2386790496. The cubic root of 865344 is about 95.2934233432.

The spelling of 865344 in words is "eight hundred sixty-five thousand, three hundred forty-four".