28301056 has 72 divisors (see below), whose sum is σ = 68433120. Its totient is φ = 11403264.

The previous prime is 28301027. The next prime is 28301057. The reversal of 28301056 is 65010382.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28301056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28301057) 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, 30000 + ... + 30928.

It is an arithmetic number, because the mean of its divisors is an integer number (950460).

Almost surely, 2^28301056 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 28301056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34216560).

28301056 is an abundant number, since it is smaller than the sum of its proper divisors (40132064).

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

28301056 is an equidigital number, since it uses as much as digits as its factorization.

28301056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 28301056 is about 5319.8736827109. The cubic root of 28301056 is about 304.7433332929.

The spelling of 28301056 in words is "twenty-eight million, three hundred one thousand, fifty-six".