28227911717 has 2 divisors, whose sum is σ = 28227911718. Its totient is φ = 28227911716.

The previous prime is 28227911651. The next prime is 28227911729. The reversal of 28227911717 is 71711972282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24209492836 + 4018418881 = 155594^2 + 63391^2 .

It is a cyclic number.

It is not a de Polignac number, because 28227911717 - 2¹² = 28227907621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28227911737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14113955858 + 14113955859.

It is an arithmetic number, because the mean of its divisors is an integer number (14113955859).

Almost surely, 2^28227911717 is an apocalyptic number.

It is an amenable number.

28227911717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28227911717 is an equidigital number, since it uses as much as digits as its factorization.

28227911717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 47.

The spelling of 28227911717 in words is "twenty-eight billion, two hundred twenty-seven million, nine hundred eleven thousand, seven hundred seventeen".