28565828700 has 144 divisors (see below), whose sum is σ = 84335852160. Its totient is φ = 7462657280.

The previous prime is 28565828657. The next prime is 28565828741. The reversal of 28565828700 is 782856582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20017387 + ... + 20018813.

It is an arithmetic number, because the mean of its divisors is an integer number (585665640).

Almost surely, 2^28565828700 is an apocalyptic number.

28565828700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28565828700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42167926080).

28565828700 is an abundant number, since it is smaller than the sum of its proper divisors (55770023460).

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

28565828700 is a wasteful number, since it uses less digits than its factorization.

28565828700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756 (or 2749 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 28565828700 in words is "twenty-eight billion, five hundred sixty-five million, eight hundred twenty-eight thousand, seven hundred".