28812025865 has 16 divisors (see below), whose sum is σ = 39551715840. Its totient is φ = 19737777600.

The previous prime is 28812025841. The next prime is 28812025877. The reversal of 28812025865 is 56852021882.

It is a happy number.

It is not a de Polignac number, because 28812025865 - 2⁸ = 28812025609 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 359786 + ... + 432515.

It is an arithmetic number, because the mean of its divisors is an integer number (2471982240).

Almost surely, 2^28812025865 is an apocalyptic number.

It is an amenable number.

28812025865 is a deficient number, since it is larger than the sum of its proper divisors (10739689975).

28812025865 is a wasteful number, since it uses less digits than its factorization.

28812025865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793352.

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 28812025865 in words is "twenty-eight billion, eight hundred twelve million, twenty-five thousand, eight hundred sixty-five".