28281131080 has 16 divisors (see below), whose sum is σ = 63632545020. Its totient is φ = 11312452416.

The previous prime is 28281131069. The next prime is 28281131149. The reversal of 28281131080 is 8013118282.

It can be written as a sum of positive squares in 2 ways, for example, as 26602262404 + 1678868676 = 163102^2 + 40974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353514099 + ... + 353514178.

Almost surely, 2^28281131080 is an apocalyptic number.

28281131080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28281131080 is an abundant number, since it is smaller than the sum of its proper divisors (35351413940).

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

28281131080 is a wasteful number, since it uses less digits than its factorization.

28281131080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707028288 (or 707028284 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The spelling of 28281131080 in words is "twenty-eight billion, two hundred eighty-one million, one hundred thirty-one thousand, eighty".