28163831886 has 48 divisors (see below), whose sum is σ = 63010846080. Its totient is φ = 9082111680.

The previous prime is 28163831869. The next prime is 28163831887. The reversal of 28163831886 is 68813836182.

28163831886 is a `hidden beast` number, since 2 + 81 + 6 + 383 + 188 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163831887) 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, 2219536 + ... + 2232188.

It is an arithmetic number, because the mean of its divisors is an integer number (1312725960).

Almost surely, 2^28163831886 is an apocalyptic number.

28163831886 is an abundant number, since it is smaller than the sum of its proper divisors (34847014194).

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

28163831886 is a wasteful number, since it uses less digits than its factorization.

28163831886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681 (or 16678 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 28163831886 in words is "twenty-eight billion, one hundred sixty-three million, eight hundred thirty-one thousand, eight hundred eighty-six".