6689844 has 48 divisors (see below), whose sum is σ = 19824000. Its totient is φ = 1911168.

The previous prime is 6689821. The next prime is 6689869. The reversal of 6689844 is 4489866.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6689844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3669 + ... + 5180.

It is an arithmetic number, because the mean of its divisors is an integer number (413000).

Almost surely, 2^6689844 is an apocalyptic number.

It is an amenable number.

6689844 is an abundant number, since it is smaller than the sum of its proper divisors (13134156).

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

6689844 is a wasteful number, since it uses less digits than its factorization.

6689844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8869 (or 8861 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6689844 is about 2586.4732745575. The cubic root of 6689844 is about 188.4250605635.

The spelling of 6689844 in words is "six million, six hundred eighty-nine thousand, eight hundred forty-four".