6639084 has 60 divisors (see below), whose sum is σ = 17942848. Its totient is φ = 2138400.

The previous prime is 6639077. The next prime is 6639107. The reversal of 6639084 is 4809366.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9714 + ... + 10374.

Almost surely, 2^6639084 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 6639084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8971424).

6639084 is an abundant number, since it is smaller than the sum of its proper divisors (11303764).

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

6639084 is a wasteful number, since it uses less digits than its factorization.

6639084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6639084 is about 2576.6420007444. The cubic root of 6639084 is about 187.9472841483.

The spelling of 6639084 in words is "six million, six hundred thirty-nine thousand, eighty-four".