28807124787 has 24 divisors (see below), whose sum is σ = 47573117280. Its totient is φ = 16454810880.

The previous prime is 28807124777. The next prime is 28807124839. The reversal of 28807124787 is 78742170882.

28807124787 is a `hidden beast` number, since 28 + 80 + 71 + 2 + 478 + 7 = 666.

It is not a de Polignac number, because 28807124787 - 2¹¹ = 28807122739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28807124707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76737 + ... + 251997.

It is an arithmetic number, because the mean of its divisors is an integer number (1982213220).

Almost surely, 2^28807124787 is an apocalyptic number.

28807124787 is a deficient number, since it is larger than the sum of its proper divisors (18765992493).

28807124787 is a wasteful number, since it uses less digits than its factorization.

28807124787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177883 (or 177880 counting only the distinct ones).

The product of its (nonzero) digits is 2809856, while the sum is 54.

The spelling of 28807124787 in words is "twenty-eight billion, eight hundred seven million, one hundred twenty-four thousand, seven hundred eighty-seven".