2113864 has 16 divisors (see below), whose sum is σ = 4172400. Its totient is φ = 1001232.

The previous prime is 2113843. The next prime is 2113873. The reversal of 2113864 is 4683112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6802 + ... + 7105.

It is an arithmetic number, because the mean of its divisors is an integer number (260775).

2^2113864 is an apocalyptic number.

It is an amenable number.

2113864 is a deficient number, since it is larger than the sum of its proper divisors (2058536).

2113864 is a wasteful number, since it uses less digits than its factorization.

2113864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13932 (or 13928 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 2113864 is about 1453.9133399209. The cubic root of 2113864 is about 128.3391073282.

Adding to 2113864 its reverse (4683112), we get a palindrome (6796976).

The spelling of 2113864 in words is "two million, one hundred thirteen thousand, eight hundred sixty-four".