28055884816 has 20 divisors (see below), whose sum is σ = 56232701100. Its totient is φ = 13544220032.

The previous prime is 28055884807. The next prime is 28055884867. The reversal of 28055884816 is 61848855082.

It can be written as a sum of positive squares in 2 ways, for example, as 8230118400 + 19825766416 = 90720^2 + 140804^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30232171 + ... + 30233098.

It is an arithmetic number, because the mean of its divisors is an integer number (2811635055).

Almost surely, 2^28055884816 is an apocalyptic number.

It is an amenable number.

28055884816 is an abundant number, since it is smaller than the sum of its proper divisors (28176816284).

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

28055884816 is a wasteful number, since it uses less digits than its factorization.

28055884816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60465306 (or 60465300 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 55.

The spelling of 28055884816 in words is "twenty-eight billion, fifty-five million, eight hundred eighty-four thousand, eight hundred sixteen".