28587117528 has 96 divisors (see below), whose sum is σ = 79115259600. Its totient is φ = 9321871104.

The previous prime is 28587117523. The next prime is 28587117551. The reversal of 28587117528 is 82571178582.

28587117528 is a `hidden beast` number, since 2 + 8 + 587 + 1 + 1 + 7 + 52 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28587117523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1313358 + ... + 1334946.

Almost surely, 2^28587117528 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 28587117528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39557629800).

28587117528 is an abundant number, since it is smaller than the sum of its proper divisors (50528142072).

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

28587117528 is a wasteful number, since it uses less digits than its factorization.

28587117528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22001 (or 21994 counting only the distinct ones).

The product of its digits is 2508800, while the sum is 54.

The spelling of 28587117528 in words is "twenty-eight billion, five hundred eighty-seven million, one hundred seventeen thousand, five hundred twenty-eight".