2808644 has 12 divisors (see below), whose sum is σ = 4935168. Its totient is φ = 1398600.

The previous prime is 2808607. The next prime is 2808647. The reversal of 2808644 is 4468082.

2808644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2808644² = 15776962237472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2808644.

It is not an unprimeable number, because it can be changed into a prime (2808647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (411264).

2^2808644 is an apocalyptic number.

It is an amenable number.

2808644 is a deficient number, since it is larger than the sum of its proper divisors (2126524).

2808644 is a wasteful number, since it uses less digits than its factorization.

2808644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866 (or 2864 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 2808644 is about 1675.9009517272. The cubic root of 2808644 is about 141.0908657632.

The spelling of 2808644 in words is "two million, eight hundred eight thousand, six hundred forty-four".