28530027108 has 216 divisors, whose sum is σ = 80714907000. Its totient is φ = 8489564160.

The previous prime is 28530027047. The next prime is 28530027109. The reversal of 28530027108 is 80172003582.

28530027108 is a `hidden beast` number, since 2 + 85 + 300 + 271 + 0 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2340430884 + 26189596224 = 48378^2 + 161832^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530027109) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 73341778 + ... + 73342166.

It is an arithmetic number, because the mean of its divisors is an integer number (373680125).

Almost surely, 2^28530027108 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 28530027108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40357453500).

28530027108 is an abundant number, since it is smaller than the sum of its proper divisors (52184879892).

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

28530027108 is a wasteful number, since it uses less digits than its factorization.

28530027108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 28530027108 in words is "twenty-eight billion, five hundred thirty million, twenty-seven thousand, one hundred eight".