28056442111 has 2 divisors, whose sum is σ = 28056442112. Its totient is φ = 28056442110.

The previous prime is 28056442067. The next prime is 28056442159. The reversal of 28056442111 is 11124465082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28056442111 - 2¹¹ = 28056440063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28056442411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028221055 + 14028221056.

It is an arithmetic number, because the mean of its divisors is an integer number (14028221056).

Almost surely, 2^28056442111 is an apocalyptic number.

28056442111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056442111 is an equidigital number, since it uses as much as digits as its factorization.

28056442111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 28056442111 in words is "twenty-eight billion, fifty-six million, four hundred forty-two thousand, one hundred eleven".