28248533328 has 160 divisors (see below), whose sum is σ = 78994944000. Its totient is φ = 8670233088.

The previous prime is 28248533311. The next prime is 28248533333. The reversal of 28248533328 is 82333584282.

It is a Cunningham number, because it is equal to 168073²-1.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6384525 + ... + 6388947.

It is an arithmetic number, because the mean of its divisors is an integer number (493718400).

Almost surely, 2^28248533328 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 28248533328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39497472000).

28248533328 is an abundant number, since it is smaller than the sum of its proper divisors (50746410672).

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

28248533328 is a wasteful number, since it uses less digits than its factorization.

28248533328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649 (or 4643 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 48.

The spelling of 28248533328 in words is "twenty-eight billion, two hundred forty-eight million, five hundred thirty-three thousand, three hundred twenty-eight".