28112804887 has 2 divisors, whose sum is σ = 28112804888. Its totient is φ = 28112804886.

The previous prime is 28112804873. The next prime is 28112804911. The reversal of 28112804887 is 78840821182.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28112804887 - 2²⁷ = 27978587159 is a prime.

It is a super-2 number, since 2×28112804887² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28112804887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28112804857) 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, 14056402443 + 14056402444.

It is an arithmetic number, because the mean of its divisors is an integer number (14056402444).

Almost surely, 2^28112804887 is an apocalyptic number.

28112804887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28112804887 is an equidigital number, since it uses as much as digits as its factorization.

28112804887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 458752, while the sum is 49.

The spelling of 28112804887 in words is "twenty-eight billion, one hundred twelve million, eight hundred four thousand, eight hundred eighty-seven".