28320775584 has 192 divisors, whose sum is σ = 82037007360. Its totient is φ = 8521390080.

The previous prime is 28320775577. The next prime is 28320775607. The reversal of 28320775584 is 48557702382.

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, 3211309 + ... + 3220115.

It is an arithmetic number, because the mean of its divisors is an integer number (427276080).

Almost surely, 2^28320775584 is an apocalyptic number.

28320775584 is a gapful number since it is divisible by the number (24) 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 28320775584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41018503680).

28320775584 is an abundant number, since it is smaller than the sum of its proper divisors (53716231776).

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

28320775584 is a wasteful number, since it uses less digits than its factorization.

28320775584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923 (or 8915 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 51.

The spelling of 28320775584 in words is "twenty-eight billion, three hundred twenty million, seven hundred seventy-five thousand, five hundred eighty-four".