2688406 has 8 divisors (see below), whose sum is σ = 4608720. Its totient is φ = 1152168.

The previous prime is 2688391. The next prime is 2688419. The reversal of 2688406 is 6048862.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96001 + ... + 96028.

It is an arithmetic number, because the mean of its divisors is an integer number (576090).

2^2688406 is an apocalyptic number.

2688406 is a deficient number, since it is larger than the sum of its proper divisors (1920314).

2688406 is a wasteful number, since it uses less digits than its factorization.

2688406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192038.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 2688406 is about 1639.6359352003. The cubic root of 2688406 is about 139.0480657745.

The spelling of 2688406 in words is "two million, six hundred eighty-eight thousand, four hundred six".