28133538608 has 20 divisors (see below), whose sum is σ = 62295692880. Its totient is φ = 12057230784.

The previous prime is 28133538607. The next prime is 28133538617. The reversal of 28133538608 is 80683533182.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28133538607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125596043 + ... + 125596266.

It is an arithmetic number, because the mean of its divisors is an integer number (3114784644).

Almost surely, 2^28133538608 is an apocalyptic number.

28133538608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28133538608 is an abundant number, since it is smaller than the sum of its proper divisors (34162154272).

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

28133538608 is a wasteful number, since it uses less digits than its factorization.

28133538608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251192324 (or 251192318 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 28133538608 in words is "twenty-eight billion, one hundred thirty-three million, five hundred thirty-eight thousand, six hundred eight".