28938775300 has 72 divisors (see below), whose sum is σ = 66581441640. Its totient is φ = 10879795200.

The previous prime is 28938775291. The next prime is 28938775319. The reversal of 28938775300 is 357783982.

It can be written as a sum of positive squares in 12 ways, for example, as 14140539396 + 14798235904 = 118914^2 + 121648^2 .

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 23 ways as a sum of consecutive naturals, for example, 1282516 + ... + 1304884.

It is an arithmetic number, because the mean of its divisors is an integer number (924742245).

Almost surely, 2^28938775300 is an apocalyptic number.

28938775300 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 28938775300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33290720820).

28938775300 is an abundant number, since it is smaller than the sum of its proper divisors (37642666340).

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

28938775300 is a wasteful number, since it uses less digits than its factorization.

28938775300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23161 (or 23154 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 28938775300 in words is "twenty-eight billion, nine hundred thirty-eight million, seven hundred seventy-five thousand, three hundred".