28573934688 has 144 divisors (see below), whose sum is σ = 88066860336. Its totient is φ = 8735800320.

The previous prime is 28573934677. The next prime is 28573934693. The reversal of 28573934688 is 88643937582.

28573934688 is a `hidden beast` number, since 2 + 85 + 7 + 3 + 93 + 468 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 563503 + ... + 612113.

It is an arithmetic number, because the mean of its divisors is an integer number (611575419).

Almost surely, 2^28573934688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28573934688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44033430168).

28573934688 is an abundant number, since it is smaller than the sum of its proper divisors (59492925648).

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

28573934688 is a wasteful number, since it uses less digits than its factorization.

28573934688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48797 (or 48786 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 28573934688 in words is "twenty-eight billion, five hundred seventy-three million, nine hundred thirty-four thousand, six hundred eighty-eight".