2688889 has 8 divisors (see below), whose sum is σ = 3086208. Its totient is φ = 2294880.

The previous prime is 2688887. The next prime is 2688913. The reversal of 2688889 is 9888862.

2688889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2688889 - 2¹ = 2688887 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2688883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1284 + ... + 2650.

It is an arithmetic number, because the mean of its divisors is an integer number (385776).

2^2688889 is an apocalyptic number.

It is an amenable number.

2688889 is a deficient number, since it is larger than the sum of its proper divisors (397319).

2688889 is a wasteful number, since it uses less digits than its factorization.

2688889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655.

The product of its digits is 442368, while the sum is 49.

The square root of 2688889 is about 1639.7832173797. The cubic root of 2688889 is about 139.0563924179.

The spelling of 2688889 in words is "two million, six hundred eighty-eight thousand, eight hundred eighty-nine".