28687550208 has 72 divisors (see below), whose sum is σ = 76404720000. Its totient is φ = 9555753984.

The previous prime is 28687550191. The next prime is 28687550219. The reversal of 28687550208 is 80205578682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138773 + ... + 1163691.

Almost surely, 2^28687550208 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 28687550208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38202360000).

28687550208 is an abundant number, since it is smaller than the sum of its proper divisors (47717169792).

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

28687550208 is a wasteful number, since it uses less digits than its factorization.

28687550208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26437 (or 26423 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 28687550208 in words is "twenty-eight billion, six hundred eighty-seven million, five hundred fifty thousand, two hundred eight".