28159918080 has 240 divisors, whose sum is σ = 102987991680. Its totient is φ = 6436159488.

The previous prime is 28159918063. The next prime is 28159918091. The reversal of 28159918080 is 8081995182.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1712136 + ... + 1728504.

It is an arithmetic number, because the mean of its divisors is an integer number (429116632).

Almost surely, 2^28159918080 is an apocalyptic number.

28159918080 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 28159918080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51493995840).

28159918080 is an abundant number, since it is smaller than the sum of its proper divisors (74828073600).

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

28159918080 is an equidigital number, since it uses as much as digits as its factorization.

28159918080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16412 (or 16386 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 51.

The spelling of 28159918080 in words is "twenty-eight billion, one hundred fifty-nine million, nine hundred eighteen thousand, eighty".