844720 has 20 divisors (see below), whose sum is σ = 1964160. Its totient is φ = 337856.

The previous prime is 844717. The next prime is 844733. The reversal of 844720 is 27448.

844720 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 (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5200 + ... + 5359.

It is an arithmetic number, because the mean of its divisors is an integer number (98208).

2⁸⁴⁴⁷²⁰ is an apocalyptic number.

844720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

844720 is an abundant number, since it is smaller than the sum of its proper divisors (1119440).

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

844720 is a wasteful number, since it uses less digits than its factorization.

844720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572 (or 10566 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 844720 is about 919.0865030018. The cubic root of 844720 is about 94.5302759388.

The spelling of 844720 in words is "eight hundred forty-four thousand, seven hundred twenty".