28788913192878 has 96 divisors (see below), whose sum is σ = 68814105141600. Its totient is φ = 8657637101568.

The previous prime is 28788913192771. The next prime is 28788913192903. The reversal of 28788913192878 is 87829131988782.

28788913192878 is a `hidden beast` number, since 287 + 8 + 89 + 1 + 3 + 192 + 8 + 78 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28788913192797 and 28788913192806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10436251 + ... + 12903222.

It is an arithmetic number, because the mean of its divisors is an integer number (716813595225).

Almost surely, 2^{28788913192878} is an apocalyptic number.

28788913192878 is an abundant number, since it is smaller than the sum of its proper divisors (40025191948722).

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

28788913192878 is a wasteful number, since it uses less digits than its factorization.

28788913192878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23339666 (or 23339663 counting only the distinct ones).

The product of its digits is 1560674304, while the sum is 81.

The spelling of 28788913192878 in words is "twenty-eight trillion, seven hundred eighty-eight billion, nine hundred thirteen million, one hundred ninety-two thousand, eight hundred seventy-eight".