28518770787 has 12 divisors (see below), whose sum is σ = 41175030744. Its totient is φ = 17550012480.

The previous prime is 28518770783. The next prime is 28518770849. The reversal of 28518770787 is 78707781582.

It is not a de Polignac number, because 28518770787 - 2² = 28518770783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28518770787.

It is not an unprimeable number, because it can be changed into a prime (28518770783) 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 11 ways as a sum of consecutive naturals, for example, 28124514 + ... + 28125527.

It is an arithmetic number, because the mean of its divisors is an integer number (3431252562).

Almost surely, 2^28518770787 is an apocalyptic number.

28518770787 is a deficient number, since it is larger than the sum of its proper divisors (12656259957).

28518770787 is a wasteful number, since it uses less digits than its factorization.

28518770787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56250070 (or 56250057 counting only the distinct ones).

The product of its (nonzero) digits is 12293120, while the sum is 60.

The spelling of 28518770787 in words is "twenty-eight billion, five hundred eighteen million, seven hundred seventy thousand, seven hundred eighty-seven".