844218 has 12 divisors (see below), whose sum is σ = 1829178. Its totient is φ = 281400.

The previous prime is 844201. The next prime is 844243. The reversal of 844218 is 812448.

It can be written as a sum of positive squares in only one way, i.e., 522729 + 321489 = 723^2 + 567^2 .

It is a junction number, because it is equal to n+sod(n) for n = 844191 and 844200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23433 + ... + 23468.

2⁸⁴⁴²¹⁸ is an apocalyptic number.

844218 is an abundant number, since it is smaller than the sum of its proper divisors (984960).

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

844218 is a wasteful number, since it uses less digits than its factorization.

844218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46909 (or 46906 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 844218 is about 918.8133651618. The cubic root of 844218 is about 94.5115464182.

The spelling of 844218 in words is "eight hundred forty-four thousand, two hundred eighteen".