28427126309 has 2 divisors, whose sum is σ = 28427126310. Its totient is φ = 28427126308.

The previous prime is 28427126293. The next prime is 28427126327. The reversal of 28427126309 is 90362172482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17497469284 + 10929657025 = 132278^2 + 104545^2 .

It is a cyclic number.

It is not a de Polignac number, because 28427126309 - 2⁴ = 28427126293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28427126309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28427126389) 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, 14213563154 + 14213563155.

It is an arithmetic number, because the mean of its divisors is an integer number (14213563155).

Almost surely, 2^28427126309 is an apocalyptic number.

It is an amenable number.

28427126309 is a deficient number, since it is larger than the sum of its proper divisors (1).

28427126309 is an equidigital number, since it uses as much as digits as its factorization.

28427126309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 28427126309 in words is "twenty-eight billion, four hundred twenty-seven million, one hundred twenty-six thousand, three hundred nine".