8809128 has 64 divisors (see below), whose sum is σ = 25920000. Its totient is φ = 2762496.

The previous prime is 8809123. The next prime is 8809139. The reversal of 8809128 is 8219088.

It is a super-2 number, since 2×8809128² = 155201472240768, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 8809092 and 8809101.

It is not an unprimeable number, because it can be changed into a prime (8809121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2473 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (405000).

Almost surely, 2^8809128 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 8809128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12960000).

8809128 is an abundant number, since it is smaller than the sum of its proper divisors (17110872).

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

8809128 is a wasteful number, since it uses less digits than its factorization.

8809128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 8809128 is about 2968.0175201639. The cubic root of 8809128 is about 206.5273821581.

The spelling of 8809128 in words is "eight million, eight hundred nine thousand, one hundred twenty-eight".