2728812 has 24 divisors (see below), whose sum is σ = 6644736. Its totient is φ = 869968.

The previous prime is 2728807. The next prime is 2728819. The reversal of 2728812 is 2188272.

It is a happy number.

2728812 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 2728812.

It is not an unprimeable number, because it can be changed into a prime (2728819) 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 7 ways as a sum of consecutive naturals, for example, 4668 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (276864).

2^2728812 is an apocalyptic number.

It is an amenable number.

2728812 is an abundant number, since it is smaller than the sum of its proper divisors (3915924).

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

2728812 is a wasteful number, since it uses less digits than its factorization.

2728812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9917 (or 9915 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 2728812 is about 1651.9116199119. The cubic root of 2728812 is about 139.7412226484.

It can be divided in two parts, 27 and 28812, that multiplied together give a square (777924 = 882²).

The spelling of 2728812 in words is "two million, seven hundred twenty-eight thousand, eight hundred twelve".