28951205328 has 100 divisors (see below), whose sum is σ = 83875585860. Its totient is φ = 9640912896.

The previous prime is 28951205317. The next prime is 28951205351. The reversal of 28951205328 is 82350215982.

28951205328 is a `hidden beast` number, since 2 + 8 + 95 + 1 + 20 + 532 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15363106704 + 13588098624 = 123948^2 + 116568^2 .

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 1374976 + ... + 1395872.

Almost surely, 2^28951205328 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 28951205328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41937792930).

28951205328 is an abundant number, since it is smaller than the sum of its proper divisors (54924380532).

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

28951205328 is a wasteful number, since it uses less digits than its factorization.

28951205328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21986 (or 21971 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 28951205328 in words is "twenty-eight billion, nine hundred fifty-one million, two hundred five thousand, three hundred twenty-eight".