28559999985 has 16 divisors (see below), whose sum is σ = 49850182080. Its totient is φ = 13847272640.

The previous prime is 28559999971. The next prime is 28560000037. The reversal of 28559999985 is 58999995582.

It is not a de Polignac number, because 28559999985 - 2⁴ = 28559999969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28559999985.

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, 86545290 + ... + 86545619.

It is an arithmetic number, because the mean of its divisors is an integer number (3115636380).

Almost surely, 2^28559999985 is an apocalyptic number.

It is an amenable number.

28559999985 is a deficient number, since it is larger than the sum of its proper divisors (21290182095).

28559999985 is a wasteful number, since it uses less digits than its factorization.

28559999985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173090928.

The product of its digits is 944784000, while the sum is 78.

The spelling of 28559999985 in words is "twenty-eight billion, five hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-five".