2111844 has 48 divisors (see below), whose sum is σ = 5820416. Its totient is φ = 583200.

The previous prime is 2111843. The next prime is 2111861. The reversal of 2111844 is 4481112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2111844.

It is not an unprimeable number, because it can be changed into a prime (2111843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2199 + ... + 3009.

2^2111844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2910208).

2111844 is an abundant number, since it is smaller than the sum of its proper divisors (3708572).

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

2111844 is a wasteful number, since it uses less digits than its factorization.

2111844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 854 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

The square root of 2111844 is about 1453.2184969921. The cubic root of 2111844 is about 128.2982141867.

Adding to 2111844 its reverse (4481112), we get a palindrome (6592956).

The spelling of 2111844 in words is "two million, one hundred eleven thousand, eight hundred forty-four".