28783712512 has 72 divisors (see below), whose sum is σ = 59276784896. Its totient is φ = 13939070976.

The previous prime is 28783712449. The next prime is 28783712521. The reversal of 28783712512 is 21521738782.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105443 + ... + 2119069.

Almost surely, 2^28783712512 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 28783712512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29638392448).

28783712512 is an abundant number, since it is smaller than the sum of its proper divisors (30493072384).

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

28783712512 is a wasteful number, since it uses less digits than its factorization.

28783712512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13903 (or 13889 counting only the distinct ones).

The product of its digits is 376320, while the sum is 46.

The spelling of 28783712512 in words is "twenty-eight billion, seven hundred eighty-three million, seven hundred twelve thousand, five hundred twelve".