8809728 has 36 divisors (see below), whose sum is σ = 23448768. Its totient is φ = 2936320.

The previous prime is 8809721. The next prime is 8809729. The reversal of 8809728 is 8279088.

It is a happy number.

It is a super-3 number, since 3×8809728³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 8809728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8809721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4968 + ... + 6503.

Almost surely, 2^8809728 is an apocalyptic number.

It is an amenable number.

8809728 is an abundant number, since it is smaller than the sum of its proper divisors (14639040).

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

8809728 is a wasteful number, since it uses less digits than its factorization.

8809728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11490 (or 11476 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 8809728 is about 2968.1185960133. The cubic root of 8809728 is about 206.5320709920.

The spelling of 8809728 in words is "eight million, eight hundred nine thousand, seven hundred twenty-eight".