2113688 has 8 divisors (see below), whose sum is σ = 3963180. Its totient is φ = 1056840.

The previous prime is 2113681. The next prime is 2113703. The reversal of 2113688 is 8863112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2113688² = 8935353922688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2113688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113681) by changing a digit.

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 as a sum of consecutive naturals, namely, 132098 + ... + 132113.

2^2113688 is an apocalyptic number.

It is an amenable number.

2113688 is a deficient number, since it is larger than the sum of its proper divisors (1849492).

2113688 is a wasteful number, since it uses less digits than its factorization.

2113688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264217 (or 264213 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 2113688 is about 1453.8528123576. The cubic root of 2113688 is about 128.3355453977.

The spelling of 2113688 in words is "two million, one hundred thirteen thousand, six hundred eighty-eight".