2688939 has 24 divisors (see below), whose sum is σ = 4288752. Its totient is φ = 1609920.

The previous prime is 2688929. The next prime is 2688943. The reversal of 2688939 is 9398862.

2688939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2688939 - 2⁷ = 2688811 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁵ + 8³ + 8⁷ + 9² + 3¹⁰ + 9² .

It is a junction number, because it is equal to n+sod(n) for n = 2688894 and 2688903.

It is not an unprimeable number, because it can be changed into a prime (2688929) 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 23 ways as a sum of consecutive naturals, for example, 15457 + ... + 15629.

It is an arithmetic number, because the mean of its divisors is an integer number (178698).

2^2688939 is an apocalyptic number.

2688939 is a deficient number, since it is larger than the sum of its proper divisors (1599813).

2688939 is a wasteful number, since it uses less digits than its factorization.

2688939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 344 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 2688939 is about 1639.7984632265. The cubic root of 2688939 is about 139.0572543323.

The spelling of 2688939 in words is "two million, six hundred eighty-eight thousand, nine hundred thirty-nine".