28171468836 has 216 divisors, whose sum is σ = 84653167872. Its totient is φ = 7736601600.

The previous prime is 28171468769. The next prime is 28171468883. The reversal of 28171468836 is 63886417182.

28171468836 is a `hidden beast` number, since 2 + 8 + 171 + 468 + 8 + 3 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 30923221 + ... + 30924131.

Almost surely, 2^28171468836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28171468836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42326583936).

28171468836 is an abundant number, since it is smaller than the sum of its proper divisors (56481699036).

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

28171468836 is a wasteful number, since it uses less digits than its factorization.

28171468836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1037 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 28171468836 in words is "twenty-eight billion, one hundred seventy-one million, four hundred sixty-eight thousand, eight hundred thirty-six".