28286747565 has 16 divisors (see below), whose sum is σ = 45473297856. Its totient is φ = 15014764800.

The previous prime is 28286747563. The next prime is 28286747603. The reversal of 28286747565 is 56574768282.

It is not a de Polignac number, because 28286747565 - 2¹ = 28286747563 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28286747499 and 28286747508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28286747561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4465516 + ... + 4471845.

It is an arithmetic number, because the mean of its divisors is an integer number (2842081116).

Almost surely, 2^28286747565 is an apocalyptic number.

It is an amenable number.

28286747565 is a deficient number, since it is larger than the sum of its proper divisors (17186550291).

28286747565 is a wasteful number, since it uses less digits than its factorization.

28286747565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8937580.

The product of its digits is 45158400, while the sum is 60.

The spelling of 28286747565 in words is "twenty-eight billion, two hundred eighty-six million, seven hundred forty-seven thousand, five hundred sixty-five".