28618111686 has 32 divisors (see below), whose sum is σ = 58846046688. Its totient is φ = 9271618560.

The previous prime is 28618111633. The next prime is 28618111693. The reversal of 28618111686 is 68611181682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140406 + ... + 277398.

It is an arithmetic number, because the mean of its divisors is an integer number (1838938959).

Almost surely, 2^28618111686 is an apocalyptic number.

28618111686 is an abundant number, since it is smaller than the sum of its proper divisors (30227935002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28618111686 is a wasteful number, since it uses less digits than its factorization.

28618111686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137976.

The product of its digits is 221184, while the sum is 48.

The spelling of 28618111686 in words is "twenty-eight billion, six hundred eighteen million, one hundred eleven thousand, six hundred eighty-six".