28821788328 has 32 divisors (see below), whose sum is σ = 72068155200. Its totient is φ = 9605438208.

The previous prime is 28821788323. The next prime is 28821788339. The reversal of 28821788328 is 82388712882.

It is a happy number.

It is a Smith number, since the sum of its digits (57) 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 (28821788323) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18093 + ... + 240771.

It is an arithmetic number, because the mean of its divisors is an integer number (2252129850).

Almost surely, 2^28821788328 is an apocalyptic number.

It is an amenable number.

28821788328 is an abundant number, since it is smaller than the sum of its proper divisors (43246366872).

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

28821788328 is a wasteful number, since it uses less digits than its factorization.

28821788328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228081 (or 228077 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 57.

The spelling of 28821788328 in words is "twenty-eight billion, eight hundred twenty-one million, seven hundred eighty-eight thousand, three hundred twenty-eight".