844885 has 4 divisors (see below), whose sum is σ = 1013868. Its totient is φ = 675904.

The previous prime is 844867. The next prime is 844891. The reversal of 844885 is 588448.

844885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 556516 = 537^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 844885 - 2⁷ = 844757 is a prime.

It is an Ulam number.

It is a Duffinian number.

844885 is a lucky number.

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, 84484 + ... + 84493.

It is an arithmetic number, because the mean of its divisors is an integer number (253467).

2⁸⁴⁴⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

844885 is a deficient number, since it is larger than the sum of its proper divisors (168983).

844885 is a wasteful number, since it uses less digits than its factorization.

844885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168982.

The product of its digits is 40960, while the sum is 37.

The square root of 844885 is about 919.1762616604. The cubic root of 844885 is about 94.5364304358.

The spelling of 844885 in words is "eight hundred forty-four thousand, eight hundred eighty-five".