2688906 has 32 divisors (see below), whose sum is σ = 5930496. Its totient is φ = 806000.

The previous prime is 2688887. The next prime is 2688913. The reversal of 2688906 is 6098862.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8491 + ... + 8801.

It is an arithmetic number, because the mean of its divisors is an integer number (185328).

2^2688906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2688906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2965248).

2688906 is an abundant number, since it is smaller than the sum of its proper divisors (3241590).

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

2688906 is a wasteful number, since it uses less digits than its factorization.

2688906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 2688906 is about 1639.7884009835. The cubic root of 2688906 is about 139.0566854700.

The spelling of 2688906 in words is "two million, six hundred eighty-eight thousand, nine hundred six".