6438439 has 8 divisors (see below), whose sum is σ = 7408800. Its totient is φ = 5480736.

The previous prime is 6438437. The next prime is 6438457. The reversal of 6438439 is 9348346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6438439 - 2¹ = 6438437 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 4³ + 3 + 8⁵ + 4¹¹ + 3⁵ + 9⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 6438398 and 6438407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2044 + ... + 4129.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^6438439 is an apocalyptic number.

6438439 is a deficient number, since it is larger than the sum of its proper divisors (970361).

6438439 is a wasteful number, since it uses less digits than its factorization.

6438439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329.

The product of its digits is 62208, while the sum is 37.

The square root of 6438439 is about 2537.4079293641. The cubic root of 6438439 is about 186.0345158900.

It can be divided in two parts, 6438 and 439, that multiplied together give a palindrome (2826282).

The spelling of 6438439 in words is "six million, four hundred thirty-eight thousand, four hundred thirty-nine".