28684571808 has 192 divisors, whose sum is σ = 82646065152. Its totient is φ = 8682685440.

The previous prime is 28684571791. The next prime is 28684571821. The reversal of 28684571808 is 80817548682.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3623791 + ... + 3631697.

It is an arithmetic number, because the mean of its divisors is an integer number (430448256).

Almost surely, 2^28684571808 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 28684571808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41323032576).

28684571808 is an abundant number, since it is smaller than the sum of its proper divisors (53961493344).

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

28684571808 is a wasteful number, since it uses less digits than its factorization.

28684571808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8027 (or 8019 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 57.

The spelling of 28684571808 in words is "twenty-eight billion, six hundred eighty-four million, five hundred seventy-one thousand, eight hundred eight".