28665446895 has 24 divisors (see below), whose sum is σ = 49725067392. Its totient is φ = 15276456000.

The previous prime is 28665446867. The next prime is 28665446941. The reversal of 28665446895 is 59864456682.

28665446895 is a `hidden beast` number, since 2 + 8 + 6 + 6 + 544 + 6 + 89 + 5 = 666.

It is not a de Polignac number, because 28665446895 - 2⁵ = 28665446863 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 186271 + ... + 303360.

It is an arithmetic number, because the mean of its divisors is an integer number (2071877808).

Almost surely, 2^28665446895 is an apocalyptic number.

28665446895 is a deficient number, since it is larger than the sum of its proper divisors (21059620497).

28665446895 is a wasteful number, since it uses less digits than its factorization.

28665446895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490943 (or 490940 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 63.

The spelling of 28665446895 in words is "twenty-eight billion, six hundred sixty-five million, four hundred forty-six thousand, eight hundred ninety-five".