844424 has 32 divisors (see below), whose sum is σ = 1918080. Its totient is φ = 340224.

The previous prime is 844421. The next prime is 844427. The reversal of 844424 is 424448.

It is an interprime number because it is at equal distance from previous prime (844421) and next prime (844427).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 844393 and 844402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509 + ... + 1395.

It is an arithmetic number, because the mean of its divisors is an integer number (59940).

2⁸⁴⁴⁴²⁴ 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 844424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959040).

844424 is an abundant number, since it is smaller than the sum of its proper divisors (1073656).

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

844424 is a wasteful number, since it uses less digits than its factorization.

844424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 913 counting only the distinct ones).

The product of its digits is 4096, while the sum is 26.

The square root of 844424 is about 918.9254594362. The cubic root of 844424 is about 94.5192331354.

The spelling of 844424 in words is "eight hundred forty-four thousand, four hundred twenty-four".