2688216 has 32 divisors (see below), whose sum is σ = 6793200. Its totient is φ = 886400.

The previous prime is 2688187. The next prime is 2688221. The reversal of 2688216 is 6128862.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

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, 1870 + ... + 2978.

2^2688216 is an apocalyptic number.

It is an amenable number.

2688216 is an abundant number, since it is smaller than the sum of its proper divisors (4104984).

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

2688216 is a wasteful number, since it uses less digits than its factorization.

2688216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1215 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 2688216 is about 1639.5779944852. The cubic root of 2688216 is about 139.0447900100.

The spelling of 2688216 in words is "two million, six hundred eighty-eight thousand, two hundred sixteen".