2728774757 has 2 divisors, whose sum is σ = 2728774758. Its totient is φ = 2728774756.

The previous prime is 2728774733. The next prime is 2728774759. The reversal of 2728774757 is 7574778272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2053086721 + 675688036 = 45311^2 + 25994^2 .

It is a cyclic number.

It is not a de Polignac number, because 2728774757 - 2²⁰ = 2727726181 is a prime.

Together with 2728774759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2728774759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364387378 + 1364387379.

It is an arithmetic number, because the mean of its divisors is an integer number (1364387379).

Almost surely, 2^2728774757 is an apocalyptic number.

It is an amenable number.

2728774757 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728774757 is an equidigital number, since it uses as much as digits as its factorization.

2728774757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10756480, while the sum is 56.

The square root of 2728774757 is about 52237.6756469887. The cubic root of 2728774757 is about 1397.4058691317.

The spelling of 2728774757 in words is "two billion, seven hundred twenty-eight million, seven hundred seventy-four thousand, seven hundred fifty-seven".