28173852560 has 80 divisors (see below), whose sum is σ = 75242255616. Its totient is φ = 9610535424.

The previous prime is 28173852559. The next prime is 28173852589. The reversal of 28173852560 is 6525837182.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17372 + ... + 238011.

Almost surely, 2^28173852560 is an apocalyptic number.

28173852560 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 28173852560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37621127808).

28173852560 is an abundant number, since it is smaller than the sum of its proper divisors (47068403056).

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

28173852560 is a wasteful number, since it uses less digits than its factorization.

28173852560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255600 (or 255594 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 28173852560 in words is "twenty-eight billion, one hundred seventy-three million, eight hundred fifty-two thousand, five hundred sixty".