28081788539 has 16 divisors (see below), whose sum is σ = 32390212608. Its totient is φ = 23847718272.

The previous prime is 28081788533. The next prime is 28081788541. The reversal of 28081788539 is 93588718082.

It is not a de Polignac number, because 28081788539 - 2⁴ = 28081788523 is a prime.

It is a super-2 number, since 2×28081788539² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28081788533) 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 in 15 ways as a sum of consecutive naturals, for example, 2642174 + ... + 2652780.

It is an arithmetic number, because the mean of its divisors is an integer number (2024388288).

Almost surely, 2^28081788539 is an apocalyptic number.

28081788539 is a deficient number, since it is larger than the sum of its proper divisors (4308424069).

28081788539 is a wasteful number, since it uses less digits than its factorization.

28081788539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14074.

The product of its (nonzero) digits is 7741440, while the sum is 59.

The spelling of 28081788539 in words is "twenty-eight billion, eighty-one million, seven hundred eighty-eight thousand, five hundred thirty-nine".