2728028161 has 2 divisors, whose sum is σ = 2728028162. Its totient is φ = 2728028160.

The previous prime is 2728028141. The next prime is 2728028197. The reversal of 2728028161 is 1618208272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2489511025 + 238517136 = 49895^2 + 15444^2 .

It is a cyclic number.

It is not a de Polignac number, because 2728028161 - 2¹⁹ = 2727503873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2728028161.

It is not a weakly prime, because it can be changed into another prime (2728028141) 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 as a sum of consecutive naturals, namely, 1364014080 + 1364014081.

It is an arithmetic number, because the mean of its divisors is an integer number (1364014081).

Almost surely, 2^2728028161 is an apocalyptic number.

It is an amenable number.

2728028161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728028161 is an equidigital number, since it uses as much as digits as its factorization.

2728028161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 2728028161 is about 52230.5290132122. The cubic root of 2728028161 is about 1397.2784135410.

The spelling of 2728028161 in words is "two billion, seven hundred twenty-eight million, twenty-eight thousand, one hundred sixty-one".