2688380 has 24 divisors (see below), whose sum is σ = 5978448. Its totient is φ = 1011968.

The previous prime is 2688377. The next prime is 2688391. The reversal of 2688380 is 838862.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2688380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3614 + ... + 4293.

It is an arithmetic number, because the mean of its divisors is an integer number (249102).

2^2688380 is an apocalyptic number.

2688380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2688380 is an abundant number, since it is smaller than the sum of its proper divisors (3290068).

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

2688380 is a wasteful number, since it uses less digits than its factorization.

2688380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933 (or 7931 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 2688380 is about 1639.6280065917. The cubic root of 2688380 is about 139.0476175211.

The spelling of 2688380 in words is "two million, six hundred eighty-eight thousand, three hundred eighty".