28159509472 has 48 divisors (see below), whose sum is σ = 57441409200. Its totient is φ = 13572751360.

The previous prime is 28159509403. The next prime is 28159509491. The reversal of 28159509472 is 27490595182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571179 + ... + 618517.

It is an arithmetic number, because the mean of its divisors is an integer number (1196696025).

Almost surely, 2^28159509472 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 28159509472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28720704600).

28159509472 is an abundant number, since it is smaller than the sum of its proper divisors (29281899728).

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

28159509472 is a wasteful number, since it uses less digits than its factorization.

28159509472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48019 (or 48011 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 28159509472 in words is "twenty-eight billion, one hundred fifty-nine million, five hundred nine thousand, four hundred seventy-two".