8785728 has 84 divisors (see below), whose sum is σ = 28793440. Its totient is φ = 2509056.

The previous prime is 8785697. The next prime is 8785783. The reversal of 8785728 is 8275878.

It is a happy number.

8785728 is a `hidden beast` number, since 8 + 78 + 572 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2943 + ... + 5121.

Almost surely, 2^8785728 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 8785728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14396720).

8785728 is an abundant number, since it is smaller than the sum of its proper divisors (20007712).

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

8785728 is a wasteful number, since it uses less digits than its factorization.

8785728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2191 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 8785728 is about 2964.0728735981. The cubic root of 8785728 is about 206.3443513217.

The spelling of 8785728 in words is "eight million, seven hundred eighty-five thousand, seven hundred twenty-eight".