2688678 has 12 divisors (see below), whose sum is σ = 5825508. Its totient is φ = 896220.

The previous prime is 2688667. The next prime is 2688701. The reversal of 2688678 is 8768862.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74668 + ... + 74703.

It is an arithmetic number, because the mean of its divisors is an integer number (485459).

2^2688678 is an apocalyptic number.

2688678 is an abundant number, since it is smaller than the sum of its proper divisors (3136830).

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

2688678 is a wasteful number, since it uses less digits than its factorization.

2688678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149379 (or 149376 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 2688678 is about 1639.7188783447. The cubic root of 2688678 is about 139.0527550214.

The spelling of 2688678 in words is "two million, six hundred eighty-eight thousand, six hundred seventy-eight".