844866 has 48 divisors (see below), whose sum is σ = 2122848. Its totient is φ = 240000.

The previous prime is 844861. The next prime is 844867. The reversal of 844866 is 668448.

It is a self number, because there is not a number n which added to its sum of digits gives 844866.

It is not an unprimeable number, because it can be changed into a prime (844861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3241 + ... + 3491.

It is an arithmetic number, because the mean of its divisors is an integer number (44226).

2⁸⁴⁴⁸⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061424).

844866 is an abundant number, since it is smaller than the sum of its proper divisors (1277982).

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

844866 is a wasteful number, since it uses less digits than its factorization.

844866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 284 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 844866 is about 919.1659262614. The cubic root of 844866 is about 94.5357217769.

It can be divided in two parts, 84 and 4866, that added together give a triangular number (4950 = T₉₉).

The spelling of 844866 in words is "eight hundred forty-four thousand, eight hundred sixty-six".