6384639 has 16 divisors (see below), whose sum is σ = 9407232. Its totient is φ = 3831168.

The previous prime is 6384629. The next prime is 6384647. The reversal of 6384639 is 9364836.

It is not a de Polignac number, because 6384639 - 2⁹ = 6384127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6384597 and 6384606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6384619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1549 + ... + 3894.

It is an arithmetic number, because the mean of its divisors is an integer number (587952).

Almost surely, 2^6384639 is an apocalyptic number.

6384639 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

6384639 is a deficient number, since it is larger than the sum of its proper divisors (3022593).

6384639 is a wasteful number, since it uses less digits than its factorization.

6384639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486.

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

The square root of 6384639 is about 2526.7843200400. The cubic root of 6384639 is about 185.5148938330.

The spelling of 6384639 in words is "six million, three hundred eighty-four thousand, six hundred thirty-nine".