8728224 has 96 divisors (see below), whose sum is σ = 24675840. Its totient is φ = 2694912.

The previous prime is 8728211. The next prime is 8728241. The reversal of 8728224 is 4228278.

It is a tau number, because it is divible by the number of its divisors (96).

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, 130239 + ... + 130305.

It is an arithmetic number, because the mean of its divisors is an integer number (257040).

Almost surely, 2^8728224 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 8728224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12337920).

8728224 is an abundant number, since it is smaller than the sum of its proper divisors (15947616).

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

8728224 is a wasteful number, since it uses less digits than its factorization.

8728224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 154 counting only the distinct ones).

The product of its digits is 14336, while the sum is 33.

The square root of 8728224 is about 2954.3567827871. The cubic root of 8728224 is about 205.8931799220.

The spelling of 8728224 in words is "eight million, seven hundred twenty-eight thousand, two hundred twenty-four".