869844 has 24 divisors (see below), whose sum is σ = 2046240. Its totient is φ = 287584.

The previous prime is 869819. The next prime is 869849. The reversal of 869844 is 448968.

869844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869844.

It is not an unprimeable number, because it can be changed into a prime (869849) by changing a digit.

869844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1867 + ... + 2285.

It is an arithmetic number, because the mean of its divisors is an integer number (85260).

2⁸⁶⁹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

869844 is an abundant number, since it is smaller than the sum of its proper divisors (1176396).

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

869844 is a wasteful number, since it uses less digits than its factorization.

869844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 597 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 869844 is about 932.6542767821. The cubic root of 869844 is about 95.4583208567.

The spelling of 869844 in words is "eight hundred sixty-nine thousand, eight hundred forty-four".