6639384 has 32 divisors (see below), whose sum is σ = 17575920. Its totient is φ = 2082816.

The previous prime is 6639383. The next prime is 6639389. The reversal of 6639384 is 4839366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7729 + ... + 8544.

Almost surely, 2^6639384 is an apocalyptic number.

It is an amenable number.

6639384 is an abundant number, since it is smaller than the sum of its proper divisors (10936536).

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

6639384 is a wasteful number, since it uses less digits than its factorization.

6639384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16299 (or 16295 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 6639384 is about 2576.7002153918. The cubic root of 6639384 is about 187.9501150276.

The spelling of 6639384 in words is "six million, six hundred thirty-nine thousand, three hundred eighty-four".