2806864 has 20 divisors (see below), whose sum is σ = 5614720. Its totient is φ = 1357920.

The previous prime is 2806861. The next prime is 2806907. The reversal of 2806864 is 4686082.

2806864 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2334 + ... + 3325.

It is an arithmetic number, because the mean of its divisors is an integer number (280736).

2^2806864 is an apocalyptic number.

It is an amenable number.

2806864 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2806864 is a wasteful number, since it uses less digits than its factorization.

2806864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5698 (or 5692 counting only the distinct ones).

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

The square root of 2806864 is about 1675.3698099226. The cubic root of 2806864 is about 141.0610536529.

The spelling of 2806864 in words is "two million, eight hundred six thousand, eight hundred sixty-four".