28571986560 has 256 divisors, whose sum is σ = 98274960000. Its totient is φ = 7019053056.

The previous prime is 28571986559. The next prime is 28571986567. The reversal of 28571986560 is 6568917582.

It is a self number, because there is not a number n which added to its sum of digits gives 28571986560.

It is not an unprimeable number, because it can be changed into a prime (28571986567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18444666 + ... + 18446214.

Almost surely, 2^28571986560 is an apocalyptic number.

28571986560 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 28571986560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49137480000).

28571986560 is an abundant number, since it is smaller than the sum of its proper divisors (69702973440).

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

28571986560 is a wasteful number, since it uses less digits than its factorization.

28571986560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2311 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 28571986560 in words is "twenty-eight billion, five hundred seventy-one million, nine hundred eighty-six thousand, five hundred sixty".