28555200128 has 192 divisors, whose sum is σ = 72374924160. Its totient is φ = 10927872000.

The previous prime is 28555200109. The next prime is 28555200217. The reversal of 28555200128 is 82100255582.

It is a junction number, because it is equal to n+sod(n) for n = 28555200091 and 28555200100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11192453 + ... + 11195003.

It is an arithmetic number, because the mean of its divisors is an integer number (376952730).

Almost surely, 2^28555200128 is an apocalyptic number.

28555200128 is a gapful number since it is divisible by the number (28) 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 28555200128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36187462080).

28555200128 is an abundant number, since it is smaller than the sum of its proper divisors (43819724032).

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

28555200128 is a wasteful number, since it uses less digits than its factorization.

28555200128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647 (or 2604 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 38.

The spelling of 28555200128 in words is "twenty-eight billion, five hundred fifty-five million, two hundred thousand, one hundred twenty-eight".