2688729 has 8 divisors (see below), whose sum is σ = 3661440. Its totient is φ = 1754256.

The previous prime is 2688701. The next prime is 2688731. The reversal of 2688729 is 9278862.

It is a happy number.

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

It is not a de Polignac number, because 2688729 - 2⁸ = 2688473 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2688799) 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, 9394 + ... + 9675.

It is an arithmetic number, because the mean of its divisors is an integer number (457680).

2^2688729 is an apocalyptic number.

It is an amenable number.

2688729 is a deficient number, since it is larger than the sum of its proper divisors (972711).

2688729 is a wasteful number, since it uses less digits than its factorization.

2688729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19119.

The product of its digits is 96768, while the sum is 42.

The square root of 2688729 is about 1639.7344297172. The cubic root of 2688729 is about 139.0536342200.

The spelling of 2688729 in words is "two million, six hundred eighty-eight thousand, seven hundred twenty-nine".