28857072528 has 80 divisors (see below), whose sum is σ = 83081140800. Its totient is φ = 9589916160.

The previous prime is 28857072527. The next prime is 28857072577. The reversal of 28857072528 is 82527075882.

28857072528 is a `hidden beast` number, since 28 + 8 + 570 + 7 + 25 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28857072527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42088 + ... + 243896.

It is an arithmetic number, because the mean of its divisors is an integer number (1038514260).

Almost surely, 2^28857072528 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 28857072528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41540570400).

28857072528 is an abundant number, since it is smaller than the sum of its proper divisors (54224068272).

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

28857072528 is a wasteful number, since it uses less digits than its factorization.

28857072528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202157 (or 202145 counting only the distinct ones).

The product of its (nonzero) digits is 5017600, while the sum is 54.

The spelling of 28857072528 in words is "twenty-eight billion, eight hundred fifty-seven million, seventy-two thousand, five hundred twenty-eight".