864844 has 6 divisors (see below), whose sum is σ = 1513484. Its totient is φ = 432420.

The previous prime is 864817. The next prime is 864883. The reversal of 864844 is 448468.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108102 + ... + 108109.

2⁸⁶⁴⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

864844 is a deficient number, since it is larger than the sum of its proper divisors (648640).

864844 is a wasteful number, since it uses less digits than its factorization.

864844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216215 (or 216213 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 864844 is about 929.9698919858. The cubic root of 864844 is about 95.2750661383.

The spelling of 864844 in words is "eight hundred sixty-four thousand, eight hundred forty-four".