28678784712 has 32 divisors (see below), whose sum is σ = 75914431200. Its totient is φ = 8997265664.

The previous prime is 28678784711. The next prime is 28678784731. The reversal of 28678784712 is 21748787682.

It is not an unprimeable number, because it can be changed into a prime (28678784711) 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 7 ways as a sum of consecutive naturals, for example, 35145162 + ... + 35145977.

It is an arithmetic number, because the mean of its divisors is an integer number (2372325975).

Almost surely, 2^28678784712 is an apocalyptic number.

It is an amenable number.

28678784712 is an abundant number, since it is smaller than the sum of its proper divisors (47235646488).

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

28678784712 is a wasteful number, since it uses less digits than its factorization.

28678784712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70291165 (or 70291161 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 60.

The spelling of 28678784712 in words is "twenty-eight billion, six hundred seventy-eight million, seven hundred eighty-four thousand, seven hundred twelve".