28228718280 has 256 divisors, whose sum is σ = 102625159680. Its totient is φ = 6063980544.

The previous prime is 28228718267. The next prime is 28228718281. The reversal of 28228718280 is 8281782282.

It is not an unprimeable number, because it can be changed into a prime (28228718281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17035212 + ... + 17036868.

It is an arithmetic number, because the mean of its divisors is an integer number (400879530).

Almost surely, 2^28228718280 is an apocalyptic number.

28228718280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28228718280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51312579840).

28228718280 is an abundant number, since it is smaller than the sum of its proper divisors (74396441400).

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

28228718280 is a wasteful number, since it uses less digits than its factorization.

28228718280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888 (or 2884 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 48.

The spelling of 28228718280 in words is "twenty-eight billion, two hundred twenty-eight million, seven hundred eighteen thousand, two hundred eighty".