28564718120 has 128 divisors (see below), whose sum is σ = 70095974400. Its totient is φ = 10448256000.

The previous prime is 28564718113. The next prime is 28564718131. The reversal of 28564718120 is 2181746582.

It is a Cunningham number, because it is equal to 169011²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1681670 + ... + 1698570.

It is an arithmetic number, because the mean of its divisors is an integer number (547624800).

Almost surely, 2^28564718120 is an apocalyptic number.

28564718120 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 28564718120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35047987200).

28564718120 is an abundant number, since it is smaller than the sum of its proper divisors (41531256280).

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

28564718120 is a wasteful number, since it uses less digits than its factorization.

28564718120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17019 (or 17015 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 28564718120 in words is "twenty-eight billion, five hundred sixty-four million, seven hundred eighteen thousand, one hundred twenty".