2688940 has 24 divisors (see below), whose sum is σ = 5830272. Its totient is φ = 1040640.

The previous prime is 2688929. The next prime is 2688943. The reversal of 2688940 is 498862.

It is a plaindrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 2688940.

It is not an unprimeable number, because it can be changed into a prime (2688943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549 + ... + 2788.

It is an arithmetic number, because the mean of its divisors is an integer number (242928).

2^2688940 is an apocalyptic number.

2688940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2688940 is an abundant number, since it is smaller than the sum of its proper divisors (3141332).

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

2688940 is a wasteful number, since it uses less digits than its factorization.

2688940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377 (or 4375 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2688940 is about 1639.7987681420. The cubic root of 2688940 is about 139.0572715705.

The spelling of 2688940 in words is "two million, six hundred eighty-eight thousand, nine hundred forty".