28524803868 has 108 divisors (see below), whose sum is σ = 80018979768. Its totient is φ = 8496962880.

The previous prime is 28524803861. The next prime is 28524803869. The reversal of 28524803868 is 86830842582.

28524803868 is a `hidden beast` number, since 2 + 8 + 524 + 80 + 38 + 6 + 8 = 666.

It is a super-2 number, since 2×28524803868² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28524803861) 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 35 ways as a sum of consecutive naturals, for example, 1368130 + ... + 1388822.

Almost surely, 2^28524803868 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 28524803868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40009489884).

28524803868 is an abundant number, since it is smaller than the sum of its proper divisors (51494175900).

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

28524803868 is a wasteful number, since it uses less digits than its factorization.

28524803868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20832 (or 20768 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 28524803868 in words is "twenty-eight billion, five hundred twenty-four million, eight hundred three thousand, eight hundred sixty-eight".