28309543009280 has 704 divisors, whose sum is σ = 78403269869568. Its totient is φ = 9715816857600.

The previous prime is 28309543009247. The next prime is 28309543009289. The reversal of 28309543009280 is 8290034590382.

It is a super-2 number, since 2×28309543009280² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28309543009289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38101672589 + ... + 38101673331.

Almost surely, 2^{28309543009280} is an apocalyptic number.

28309543009280 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 28309543009280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39201634934784).

28309543009280 is an abundant number, since it is smaller than the sum of its proper divisors (50093726860288).

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

28309543009280 is a wasteful number, since it uses less digits than its factorization.

28309543009280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 28309543009280 in words is "twenty-eight trillion, three hundred nine billion, five hundred forty-three million, nine thousand, two hundred eighty".