2688540 has 24 divisors (see below), whose sum is σ = 7528080. Its totient is φ = 716928.

The previous prime is 2688529. The next prime is 2688547. The reversal of 2688540 is 458862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688547) 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, 22345 + ... + 22464.

It is an arithmetic number, because the mean of its divisors is an integer number (313670).

2^2688540 is an apocalyptic number.

2688540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2688540 is an abundant number, since it is smaller than the sum of its proper divisors (4839540).

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

2688540 is a wasteful number, since it uses less digits than its factorization.

2688540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44821 (or 44819 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 2688540 is about 1639.6767974208. The cubic root of 2688540 is about 139.0503759577.

The spelling of 2688540 in words is "two million, six hundred eighty-eight thousand, five hundred forty".