28508939160 has 128 divisors (see below), whose sum is σ = 92149202880. Its totient is φ = 7014279168.

The previous prime is 28508939159. The next prime is 28508939167. The reversal of 28508939160 is 6193980582.

It is a happy number.

It is a super-2 number, since 2×28508939160² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28508939167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5920914 + ... + 5925726.

Almost surely, 2^28508939160 is an apocalyptic number.

28508939160 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 28508939160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46074601440).

28508939160 is an abundant number, since it is smaller than the sum of its proper divisors (63640263720).

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

28508939160 is a wasteful number, since it uses less digits than its factorization.

28508939160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8637 (or 8633 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 28508939160 in words is "twenty-eight billion, five hundred eight million, nine hundred thirty-nine thousand, one hundred sixty".