863844 has 12 divisors (see below), whose sum is σ = 2015664. Its totient is φ = 287944.

The previous prime is 863843. The next prime is 863851. The reversal of 863844 is 448368.

863844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (863843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35982 + ... + 36005.

It is an arithmetic number, because the mean of its divisors is an integer number (167972).

2⁸⁶³⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

863844 is an abundant number, since it is smaller than the sum of its proper divisors (1151820).

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

863844 is a wasteful number, since it uses less digits than its factorization.

863844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71994 (or 71992 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 863844 is about 929.4320846625. The cubic root of 863844 is about 95.2383304915.

The spelling of 863844 in words is "eight hundred sixty-three thousand, eight hundred forty-four".