2111886 has 64 divisors (see below), whose sum is σ = 5544960. Its totient is φ = 583200.

The previous prime is 2111873. The next prime is 2111897. The reversal of 2111886 is 6881112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13911 + ... + 14061.

It is an arithmetic number, because the mean of its divisors is an integer number (86640).

2^2111886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2772480).

2111886 is an abundant number, since it is smaller than the sum of its proper divisors (3433074).

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

2111886 is a wasteful number, since it uses less digits than its factorization.

2111886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 200 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 2111886 is about 1453.2329476034. The cubic root of 2111886 is about 128.2990647056.

Adding to 2111886 its reverse (6881112), we get a palindrome (8992998).

The spelling of 2111886 in words is "two million, one hundred eleven thousand, eight hundred eighty-six".