2113806 has 8 divisors (see below), whose sum is σ = 4227624. Its totient is φ = 704600.

The previous prime is 2113801. The next prime is 2113819. The reversal of 2113806 is 6083112.

It is a sphenic number, since it is the product of 3 distinct primes.

2113806 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176145 + ... + 176156.

It is an arithmetic number, because the mean of its divisors is an integer number (528453).

2^2113806 is an apocalyptic number.

2113806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2113806 is a wasteful number, since it uses less digits than its factorization.

2113806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352306.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2113806 is about 1453.8933936159. The cubic root of 2113806 is about 128.3379335320.

Adding to 2113806 its reverse (6083112), we get a palindrome (8196918).

The spelling of 2113806 in words is "two million, one hundred thirteen thousand, eight hundred six".