28888256 has 28 divisors (see below), whose sum is σ = 58189368. Its totient is φ = 14226432.

The previous prime is 28888201. The next prime is 28888259. The reversal of 28888256 is 65288882.

It is a self number, because there is not a number n which added to its sum of digits gives 28888256.

It is not an unprimeable number, because it can be changed into a prime (28888259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920 + ... + 7656.

Almost surely, 2^28888256 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 28888256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29094684).

28888256 is an abundant number, since it is smaller than the sum of its proper divisors (29301112).

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

28888256 is an equidigital number, since it uses as much as digits as its factorization.

28888256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6816 (or 6806 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The square root of 28888256 is about 5374.7796233892. The cubic root of 28888256 is about 306.8365620241.

The spelling of 28888256 in words is "twenty-eight million, eight hundred eighty-eight thousand, two hundred fifty-six".