28169680128 has 72 divisors (see below), whose sum is σ = 75033751968. Its totient is φ = 9382213632.

The previous prime is 28169680103. The next prime is 28169680141. The reversal of 28169680128 is 82108696182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966375 + ... + 995097.

It is an arithmetic number, because the mean of its divisors is an integer number (1042135444).

Almost surely, 2^28169680128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28169680128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37516875984).

28169680128 is an abundant number, since it is smaller than the sum of its proper divisors (46864071840).

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

28169680128 is a wasteful number, since it uses less digits than its factorization.

28169680128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30019 (or 30005 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 28169680128 in words is "twenty-eight billion, one hundred sixty-nine million, six hundred eighty thousand, one hundred twenty-eight".