2688249 has 8 divisors (see below), whose sum is σ = 3596320. Its totient is φ = 1786176.

The previous prime is 2688239. The next prime is 2688299. The reversal of 2688249 is 9428862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2688249 - 2⁴ = 2688233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2688239) 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, 319 + ... + 2340.

It is an arithmetic number, because the mean of its divisors is an integer number (449540).

2^2688249 is an apocalyptic number.

It is an amenable number.

2688249 is a deficient number, since it is larger than the sum of its proper divisors (908071).

2688249 is a wasteful number, since it uses less digits than its factorization.

2688249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999.

The product of its digits is 55296, while the sum is 39.

The square root of 2688249 is about 1639.5880580195. The cubic root of 2688249 is about 139.0453589696.

The spelling of 2688249 in words is "two million, six hundred eighty-eight thousand, two hundred forty-nine".