2118844 has 24 divisors (see below), whose sum is σ = 4564448. Its totient is φ = 838080.

The previous prime is 2118841. The next prime is 2118871. The reversal of 2118844 is 4488112.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118841) 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, 2547 + ... + 3274.

2^2118844 is an apocalyptic number.

It is an amenable number.

2118844 is an abundant number, since it is smaller than the sum of its proper divisors (2445604).

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

2118844 is a wasteful number, since it uses less digits than its factorization.

2118844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5845 (or 5843 counting only the distinct ones).

The product of its digits is 2048, while the sum is 28.

The square root of 2118844 is about 1455.6249516960. The cubic root of 2118844 is about 128.4398119316.

The spelling of 2118844 in words is "two million, one hundred eighteen thousand, eight hundred forty-four".