2806 is an esthetic number in base 11, because in such base it adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
2806 is an undulating number in base 11.
It is a plaindrome in base 7 and base 13.
It is a nialpdrome in base 5 and base 15.
It is a self number, because there is not a number n which added to its sum of digits gives 2806.
It is a congruent number.
2806 is the 34-th centered pentagonal number.
2806 is a wasteful number, since it uses less digits than its factorization.
2806 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 86.
The square root of 2806 is about 52.9716905526. The cubic root of 2806 is about 14.1046578512.
The spelling of 2806 in words is "two thousand, eight hundred six".