28080280729 has 2 divisors, whose sum is σ = 28080280730. Its totient is φ = 28080280728.

The previous prime is 28080280703. The next prime is 28080280769. The reversal of 28080280729 is 92708208082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22715011225 + 5365269504 = 150715^2 + 73248^2 .

It is a cyclic number.

It is not a de Polignac number, because 28080280729 - 2¹⁵ = 28080247961 is a prime.

It is not a weakly prime, because it can be changed into another prime (28080280769) 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, 14040140364 + 14040140365.

It is an arithmetic number, because the mean of its divisors is an integer number (14040140365).

Almost surely, 2^28080280729 is an apocalyptic number.

It is an amenable number.

28080280729 is a deficient number, since it is larger than the sum of its proper divisors (1).

28080280729 is an equidigital number, since it uses as much as digits as its factorization.

28080280729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 28080280729 in words is "twenty-eight billion, eighty million, two hundred eighty thousand, seven hundred twenty-nine".