28786735818 has 24 divisors (see below), whose sum is σ = 62596438788. Its totient is φ = 9560935872.

The previous prime is 28786735801. The next prime is 28786735829. The reversal of 28786735818 is 81853768782.

It can be written as a sum of positive squares in 2 ways, for example, as 25146664929 + 3640070889 = 158577^2 + 60333^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2881771 + ... + 2891742.

Almost surely, 2^28786735818 is an apocalyptic number.

28786735818 is an abundant number, since it is smaller than the sum of its proper divisors (33809702970).

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

28786735818 is a wasteful number, since it uses less digits than its factorization.

28786735818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5773798 (or 5773795 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 63.

The spelling of 28786735818 in words is "twenty-eight billion, seven hundred eighty-six million, seven hundred thirty-five thousand, eight hundred eighteen".