28728571585 has 16 divisors (see below), whose sum is σ = 39403353600. Its totient is φ = 19697507136.

The previous prime is 28728571559. The next prime is 28728571601. The reversal of 28728571585 is 58517582782.

It is a cyclic number.

It is not a de Polignac number, because 28728571585 - 2¹¹ = 28728569537 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339576 + ... + 415654.

It is an arithmetic number, because the mean of its divisors is an integer number (2462709600).

Almost surely, 2^28728571585 is an apocalyptic number.

It is an amenable number.

28728571585 is a deficient number, since it is larger than the sum of its proper divisors (10674782015).

28728571585 is a wasteful number, since it uses less digits than its factorization.

28728571585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86880.

The product of its digits is 12544000, while the sum is 58.

The spelling of 28728571585 in words is "twenty-eight billion, seven hundred twenty-eight million, five hundred seventy-one thousand, five hundred eighty-five".