28783567812 has 12 divisors (see below), whose sum is σ = 67161658256. Its totient is φ = 9594522600.

The previous prime is 28783567811. The next prime is 28783567817. The reversal of 28783567812 is 21876538782.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28783567811) by changing a digit.

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, 1199315314 + ... + 1199315337.

Almost surely, 2^28783567812 is an apocalyptic number.

It is an amenable number.

28783567812 is an abundant number, since it is smaller than the sum of its proper divisors (38378090444).

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

28783567812 is a wasteful number, since it uses less digits than its factorization.

28783567812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398630658 (or 2398630656 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 57.

The spelling of 28783567812 in words is "twenty-eight billion, seven hundred eighty-three million, five hundred sixty-seven thousand, eight hundred twelve".