6689128 has 16 divisors (see below), whose sum is σ = 12569760. Its totient is φ = 3337200.

The previous prime is 6689117. The next prime is 6689131. The reversal of 6689128 is 8219866.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5973 + ... + 7003.

It is an arithmetic number, because the mean of its divisors is an integer number (785610).

Almost surely, 2^6689128 is an apocalyptic number.

It is an amenable number.

6689128 is a deficient number, since it is larger than the sum of its proper divisors (5880632).

6689128 is a wasteful number, since it uses less digits than its factorization.

6689128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848 (or 1844 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 6689128 is about 2586.3348584435. The cubic root of 6689128 is about 188.4183380770.

The spelling of 6689128 in words is "six million, six hundred eighty-nine thousand, one hundred twenty-eight".