6438320 has 40 divisors (see below), whose sum is σ = 17109024. Its totient is φ = 2207232.

The previous prime is 6438307. The next prime is 6438331. The reversal of 6438320 is 238346.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 6438320.

It is an unprimeable number.

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, 5189 + ... + 6308.

Almost surely, 2^6438320 is an apocalyptic number.

It is an amenable number.

6438320 is an abundant number, since it is smaller than the sum of its proper divisors (10670704).

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

6438320 is a wasteful number, since it uses less digits than its factorization.

6438320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11517 (or 11511 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 6438320 is about 2537.3844801291. The cubic root of 6438320 is about 186.0333697403.

Adding to 6438320 its sum of digits (26), we get a palindrome (6438346).

The spelling of 6438320 in words is "six million, four hundred thirty-eight thousand, three hundred twenty".