2728873 has 4 divisors (see below), whose sum is σ = 3118720. Its totient is φ = 2339028.

The previous prime is 2728853. The next prime is 2728877. The reversal of 2728873 is 3788272.

2728873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2728873 - 2⁵ = 2728841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728877) 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, 194913 + ... + 194926.

It is an arithmetic number, because the mean of its divisors is an integer number (779680).

2^2728873 is an apocalyptic number.

It is an amenable number.

2728873 is a deficient number, since it is larger than the sum of its proper divisors (389847).

2728873 is an equidigital number, since it uses as much as digits as its factorization.

2728873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389846.

The product of its digits is 37632, while the sum is 37.

The square root of 2728873 is about 1651.9300832662. The cubic root of 2728873 is about 139.7422639014.

It can be divided in two parts, 27 and 28873, that added together give a square (28900 = 170²).

The spelling of 2728873 in words is "two million, seven hundred twenty-eight thousand, eight hundred seventy-three".