2811728 has 20 divisors (see below), whose sum is σ = 5565120. Its totient is φ = 1375584.

The previous prime is 2811719. The next prime is 2811761. The reversal of 2811728 is 8271182.

2811728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2811728.

It is a congruent number.

It is an unprimeable number.

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, 1118 + ... + 2621.

It is an arithmetic number, because the mean of its divisors is an integer number (278256).

2^2811728 is an apocalyptic number.

It is an amenable number.

2811728 is a deficient number, since it is larger than the sum of its proper divisors (2753392).

2811728 is a wasteful number, since it uses less digits than its factorization.

2811728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794 (or 3788 counting only the distinct ones).

The product of its digits is 1792, while the sum is 29.

The square root of 2811728 is about 1676.8208013977. The cubic root of 2811728 is about 141.1424879536.

The spelling of 2811728 in words is "two million, eight hundred eleven thousand, seven hundred twenty-eight".