28618447187 has 16 divisors (see below), whose sum is σ = 31991518944. Its totient is φ = 25374336000.

The previous prime is 28618447177. The next prime is 28618447189. The reversal of 28618447187 is 78174481682.

It is a cyclic number.

It is not a de Polignac number, because 28618447187 - 2¹⁰ = 28618446163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28618447189) 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 15 ways as a sum of consecutive naturals, for example, 1821887 + ... + 1837527.

It is an arithmetic number, because the mean of its divisors is an integer number (1999469934).

Almost surely, 2^28618447187 is an apocalyptic number.

28618447187 is a deficient number, since it is larger than the sum of its proper divisors (3373071757).

28618447187 is a wasteful number, since it uses less digits than its factorization.

28618447187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19750.

The product of its digits is 4816896, while the sum is 56.

The spelling of 28618447187 in words is "twenty-eight billion, six hundred eighteen million, four hundred forty-seven thousand, one hundred eighty-seven".