2728705831 has 2 divisors, whose sum is σ = 2728705832. Its totient is φ = 2728705830.

The previous prime is 2728705829. The next prime is 2728705873. The reversal of 2728705831 is 1385078272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2728705831 - 2¹ = 2728705829 is a prime.

It is a super-2 number, since 2×2728705831² = 14891671024266801122, which contains 22 as substring.

Together with 2728705829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2728705801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364352915 + 1364352916.

It is an arithmetic number, because the mean of its divisors is an integer number (1364352916).

Almost surely, 2^2728705831 is an apocalyptic number.

2728705831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728705831 is an equidigital number, since it uses as much as digits as its factorization.

2728705831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 2728705831 is about 52237.0159082618. The cubic root of 2728705831 is about 1397.3941033618.

The spelling of 2728705831 in words is "two billion, seven hundred twenty-eight million, seven hundred five thousand, eight hundred thirty-one".