2688189 has 12 divisors (see below), whose sum is σ = 4169664. Its totient is φ = 1536024.

The previous prime is 2688187. The next prime is 2688221. The reversal of 2688189 is 9818862.

It is not a de Polignac number, because 2688189 - 2¹ = 2688187 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2688189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8997 + ... + 9290.

It is an arithmetic number, because the mean of its divisors is an integer number (347472).

2^2688189 is an apocalyptic number.

It is an amenable number.

2688189 is a deficient number, since it is larger than the sum of its proper divisors (1481475).

2688189 is a wasteful number, since it uses less digits than its factorization.

2688189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18304 (or 18297 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 2688189 is about 1639.5697606384. The cubic root of 2688189 is about 139.0443244941.

The spelling of 2688189 in words is "two million, six hundred eighty-eight thousand, one hundred eighty-nine".