28551712 has 72 divisors (see below), whose sum is σ = 66361680. Its totient is φ = 12055680.

The previous prime is 28551709. The next prime is 28551749. The reversal of 28551712 is 21715582.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 205339 + ... + 205477.

It is an arithmetic number, because the mean of its divisors is an integer number (921690).

Almost surely, 2^28551712 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 28551712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33180840).

28551712 is an abundant number, since it is smaller than the sum of its proper divisors (37809968).

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

28551712 is a wasteful number, since it uses less digits than its factorization.

28551712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 279 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 28551712 is about 5343.3802035790. The cubic root of 28551712 is about 305.6403709355.

The spelling of 28551712 in words is "twenty-eight million, five hundred fifty-one thousand, seven hundred twelve".