28085837512 has 16 divisors (see below), whose sum is σ = 53252642700. Its totient is φ = 13885132800.

The previous prime is 28085837497. The next prime is 28085837597. The reversal of 28085837512 is 21573858082.

It can be written as a sum of positive squares in 2 ways, for example, as 27005663556 + 1080173956 = 164334^2 + 32866^2 .

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 3 ways as a sum of consecutive naturals, for example, 19722489 + ... + 19723912.

Almost surely, 2^28085837512 is an apocalyptic number.

It is an amenable number.

28085837512 is a deficient number, since it is larger than the sum of its proper divisors (25166805188).

28085837512 is a wasteful number, since it uses less digits than its factorization.

28085837512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39446496 (or 39446492 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 28085837512 in words is "twenty-eight billion, eighty-five million, eight hundred thirty-seven thousand, five hundred twelve".