28143478068 has 24 divisors (see below), whose sum is σ = 65702931840. Its totient is φ = 9376185600.

The previous prime is 28143478031. The next prime is 28143478117. The reversal of 28143478068 is 86087434182.

It is a self number, because there is not a number n which added to its sum of digits gives 28143478068.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 598108 + ... + 643443.

It is an arithmetic number, because the mean of its divisors is an integer number (2737622160).

Almost surely, 2^28143478068 is an apocalyptic number.

It is an amenable number.

28143478068 is an abundant number, since it is smaller than the sum of its proper divisors (37559453772).

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

28143478068 is a wasteful number, since it uses less digits than its factorization.

28143478068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243447 (or 1243445 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 51.

The spelling of 28143478068 in words is "twenty-eight billion, one hundred forty-three million, four hundred seventy-eight thousand, sixty-eight".