28038378688 has 112 divisors (see below), whose sum is σ = 57453580800. Its totient is φ = 13571712000.

The previous prime is 28038378671. The next prime is 28038378691. The reversal of 28038378688 is 88687383082.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 111706563 + ... + 111706813.

It is an arithmetic number, because the mean of its divisors is an integer number (512978400).

Almost surely, 2^28038378688 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 28038378688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28726790400).

28038378688 is an abundant number, since it is smaller than the sum of its proper divisors (29415202112).

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

28038378688 is a wasteful number, since it uses less digits than its factorization.

28038378688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 61.

The spelling of 28038378688 in words is "twenty-eight billion, thirty-eight million, three hundred seventy-eight thousand, six hundred eighty-eight".