28105453787 has 2 divisors, whose sum is σ = 28105453788. Its totient is φ = 28105453786.

The previous prime is 28105453763. The next prime is 28105453823. The reversal of 28105453787 is 78735450182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28105453787 - 2¹⁸ = 28105191643 is a prime.

It is not a weakly prime, because it can be changed into another prime (28105443787) 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, 14052726893 + 14052726894.

It is an arithmetic number, because the mean of its divisors is an integer number (14052726894).

Almost surely, 2^28105453787 is an apocalyptic number.

28105453787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28105453787 is an equidigital number, since it uses as much as digits as its factorization.

28105453787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 28105453787 in words is "twenty-eight billion, one hundred five million, four hundred fifty-three thousand, seven hundred eighty-seven".