28285515536 has 80 divisors (see below), whose sum is σ = 58919294400. Its totient is φ = 13114483200.

The previous prime is 28285515481. The next prime is 28285515589. The reversal of 28285515536 is 63551558282.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3909170 + ... + 3916398.

It is an arithmetic number, because the mean of its divisors is an integer number (736491180).

Almost surely, 2^28285515536 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 28285515536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29459647200).

28285515536 is an abundant number, since it is smaller than the sum of its proper divisors (30633778864).

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

28285515536 is a wasteful number, since it uses less digits than its factorization.

28285515536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7528 (or 7522 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 50.

The spelling of 28285515536 in words is "twenty-eight billion, two hundred eighty-five million, five hundred fifteen thousand, five hundred thirty-six".