28847232 has 128 divisors (see below), whose sum is σ = 90331200. Its totient is φ = 9031680.

The previous prime is 28847219. The next prime is 28847243. The reversal of 28847232 is 23274882.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58507 + ... + 58997.

Almost surely, 2^28847232 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 28847232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45165600).

28847232 is an abundant number, since it is smaller than the sum of its proper divisors (61483968).

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

28847232 is a wasteful number, since it uses less digits than its factorization.

28847232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 513 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 28847232 is about 5370.9619250186. The cubic root of 28847232 is about 306.6912477671.

The spelling of 28847232 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred thirty-two".