2728818 has 48 divisors (see below), whose sum is σ = 6364800. Its totient is φ = 842400.

The previous prime is 2728807. The next prime is 2728819. The reversal of 2728818 is 8188272.

2728818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 26968 + ... + 27068.

It is an arithmetic number, because the mean of its divisors is an integer number (132600).

2^2728818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2728818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3182400).

2728818 is an abundant number, since it is smaller than the sum of its proper divisors (3635982).

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

2728818 is a wasteful number, since it uses less digits than its factorization.

2728818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 204 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 2728818 is about 1651.9134359887. The cubic root of 2728818 is about 139.7413250674.

The spelling of 2728818 in words is "two million, seven hundred twenty-eight thousand, eight hundred eighteen".