9003281728 has 56 divisors (see below), whose sum is σ = 20531149184. Its totient is φ = 3837196800.

The previous prime is 9003281711. The next prime is 9003281761. The reversal of 9003281728 is 8271823009.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25573 + ... + 136603.

It is an arithmetic number, because the mean of its divisors is an integer number (366627664).

Almost surely, 2^9003281728 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 9003281728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10265574592).

9003281728 is an abundant number, since it is smaller than the sum of its proper divisors (11527867456).

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

9003281728 is a wasteful number, since it uses less digits than its factorization.

9003281728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111231 (or 111221 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 9003281728 is about 94885.6244538655. The cubic root of 9003281728 is about 2080.3366171182.

It can be divided in two parts, 9003281 and 728, that added together give a palindrome (9004009).

The spelling of 9003281728 in words is "nine billion, three million, two hundred eighty-one thousand, seven hundred twenty-eight".