28093186865 has 16 divisors (see below), whose sum is σ = 34428194640. Its totient is φ = 22001971200.

The previous prime is 28093186841. The next prime is 28093186871. The reversal of 28093186865 is 56868139082.

It can be written as a sum of positive squares in 8 ways, for example, as 1887728704 + 26205458161 = 43448^2 + 161881^2 .

It is not a de Polignac number, because 28093186865 - 2²⁰ = 28092138289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28093186865.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267584 + ... + 357473.

It is an arithmetic number, because the mean of its divisors is an integer number (2151762165).

Almost surely, 2^28093186865 is an apocalyptic number.

It is an amenable number.

28093186865 is a deficient number, since it is larger than the sum of its proper divisors (6335007775).

28093186865 is a wasteful number, since it uses less digits than its factorization.

28093186865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625252.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 28093186865 in words is "twenty-eight billion, ninety-three million, one hundred eighty-six thousand, eight hundred sixty-five".