8664128 has 56 divisors (see below), whose sum is σ = 19409664. Its totient is φ = 3801600.

The previous prime is 8664109. The next prime is 8664157. The reversal of 8664128 is 8214668.

It is a super-2 number, since 2×8664128² = 150134228000768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21626 + ... + 22022.

Almost surely, 2^8664128 is an apocalyptic number.

8664128 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8664128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9704832).

8664128 is an abundant number, since it is smaller than the sum of its proper divisors (10745536).

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

8664128 is a wasteful number, since it uses less digits than its factorization.

8664128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 441 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 8664128 is about 2943.4890861017. The cubic root of 8664128 is about 205.3879467181.

It can be divided in two parts, 866 and 4128, that added together give a palindrome (4994).

The spelling of 8664128 in words is "eight million, six hundred sixty-four thousand, one hundred twenty-eight".