28285106568 has 128 divisors (see below), whose sum is σ = 75526577280. Its totient is φ = 8814274560.

The previous prime is 28285106539. The next prime is 28285106627. The reversal of 28285106568 is 86560158282.

It is a self number, because there is not a number n which added to its sum of digits gives 28285106568.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2236230 + ... + 2248842.

It is an arithmetic number, because the mean of its divisors is an integer number (590051385).

Almost surely, 2^28285106568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28285106568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37763288640).

28285106568 is an abundant number, since it is smaller than the sum of its proper divisors (47241470712).

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

28285106568 is a wasteful number, since it uses less digits than its factorization.

28285106568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12759 (or 12755 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 51.

The spelling of 28285106568 in words is "twenty-eight billion, two hundred eighty-five million, one hundred six thousand, five hundred sixty-eight".