28868941920 has 576 divisors, whose sum is σ = 114672983040. Its totient is φ = 6050967552.

The previous prime is 28868941897. The next prime is 28868941957. The reversal of 28868941920 is 2914986882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 80414701 + ... + 80415059.

It is an arithmetic number, because the mean of its divisors is an integer number (199085040).

Almost surely, 2^28868941920 is an apocalyptic number.

28868941920 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 28868941920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57336491520).

28868941920 is an abundant number, since it is smaller than the sum of its proper divisors (85804041120).

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

28868941920 is a wasteful number, since it uses less digits than its factorization.

28868941920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 28868941920 in words is "twenty-eight billion, eight hundred sixty-eight million, nine hundred forty-one thousand, nine hundred twenty".