28281516256 has 96 divisors (see below), whose sum is σ = 65964810240. Its totient is φ = 11679897600.

The previous prime is 28281516253. The next prime is 28281516293. The reversal of 28281516256 is 65261518282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281516253) by changing a digit.

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, 1651096 + ... + 1668136.

It is an arithmetic number, because the mean of its divisors is an integer number (687133440).

Almost surely, 2^28281516256 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 28281516256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32982405120).

28281516256 is an abundant number, since it is smaller than the sum of its proper divisors (37683293984).

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

28281516256 is a wasteful number, since it uses less digits than its factorization.

28281516256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17328 (or 17320 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The spelling of 28281516256 in words is "twenty-eight billion, two hundred eighty-one million, five hundred sixteen thousand, two hundred fifty-six".