28816256 has 64 divisors (see below), whose sum is σ = 67932000. Its totient is φ = 11913216.

The previous prime is 28816253. The next prime is 28816289. The reversal of 28816256 is 65261882.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28816253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25430 + ... + 26538.

Almost surely, 2^28816256 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 28816256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33966000).

28816256 is an abundant number, since it is smaller than the sum of its proper divisors (39115744).

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

28816256 is a wasteful number, since it uses less digits than its factorization.

28816256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1147 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 28816256 is about 5368.0774957148. The cubic root of 28816256 is about 306.5814339902.

The spelling of 28816256 in words is "twenty-eight million, eight hundred sixteen thousand, two hundred fifty-six".