2728605839 has 2 divisors, whose sum is σ = 2728605840. Its totient is φ = 2728605838.

The previous prime is 2728605797. The next prime is 2728605871. The reversal of 2728605839 is 9385068272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2728605839 - 2²⁰ = 2727557263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2728605739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364302919 + 1364302920.

It is an arithmetic number, because the mean of its divisors is an integer number (1364302920).

Almost surely, 2^2728605839 is an apocalyptic number.

2728605839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728605839 is an equidigital number, since it uses as much as digits as its factorization.

2728605839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 2728605839 is about 52236.0588004110. The cubic root of 2728605839 is about 1397.3770342276.

The spelling of 2728605839 in words is "two billion, seven hundred twenty-eight million, six hundred five thousand, eight hundred thirty-nine".