2728155 has 16 divisors (see below), whose sum is σ = 4506624. Its totient is φ = 1407840.

The previous prime is 2728129. The next prime is 2728163. The reversal of 2728155 is 5518272.

2728155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2728155 - 2⁷ = 2728027 is a prime.

2728155 is a lucky 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 15 ways as a sum of consecutive naturals, for example, 2469 + ... + 3398.

It is an arithmetic number, because the mean of its divisors is an integer number (281664).

2^2728155 is an apocalyptic number.

2728155 is a deficient number, since it is larger than the sum of its proper divisors (1778469).

2728155 is a wasteful number, since it uses less digits than its factorization.

2728155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906.

The product of its digits is 5600, while the sum is 30.

The square root of 2728155 is about 1651.7127474231. The cubic root of 2728155 is about 139.7300068578.

It can be divided in two parts, 27 and 28155, that added together give a palindrome (28182).

The spelling of 2728155 in words is "two million, seven hundred twenty-eight thousand, one hundred fifty-five".