2806866 has 32 divisors (see below), whose sum is σ = 6350400. Its totient is φ = 918720.

The previous prime is 2806861. The next prime is 2806907. The reversal of 2806866 is 6686082.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2806866.

It is not an unprimeable number, because it can be changed into a prime (2806861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2746 + ... + 3626.

It is an arithmetic number, because the mean of its divisors is an integer number (198450).

2^2806866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2806866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3175200).

2806866 is an abundant number, since it is smaller than the sum of its proper divisors (3543534).

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

2806866 is a wasteful number, since it uses less digits than its factorization.

2806866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2806866 is about 1675.3704068056. The cubic root of 2806866 is about 141.0610871567.

The spelling of 2806866 in words is "two million, eight hundred six thousand, eight hundred sixty-six".