844140 has 48 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 204480.

The previous prime is 844139. The next prime is 844141. The reversal of 844140 is 41448.

844140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (844139) and next prime (844141).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 844140.

It is not an unprimeable number, because it can be changed into a prime (844141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21 + ... + 1299.

It is an arithmetic number, because the mean of its divisors is an integer number (53760).

2⁸⁴⁴¹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290240).

844140 is an abundant number, since it is smaller than the sum of its proper divisors (1736340).

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

844140 is a wasteful number, since it uses less digits than its factorization.

844140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 844140 is about 918.7709181292. The cubic root of 844140 is about 94.5086355872.

Adding to 844140 its reverse (41448), we get a palindrome (885588).

It can be divided in two parts, 84 and 4140, that added together give a palindrome (4224).

The spelling of 844140 in words is "eight hundred forty-four thousand, one hundred forty".