6438243 has 16 divisors (see below), whose sum is σ = 9863936. Its totient is φ = 3659040.

The previous prime is 6438241. The next prime is 6438251. The reversal of 6438243 is 3428346.

6438243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6438243 - 2¹ = 6438241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6438243.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438241) 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, 3705 + ... + 5157.

It is an arithmetic number, because the mean of its divisors is an integer number (616496).

Almost surely, 2^6438243 is an apocalyptic number.

6438243 is a deficient number, since it is larger than the sum of its proper divisors (3425693).

6438243 is a wasteful number, since it uses less digits than its factorization.

6438243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674.

The product of its digits is 13824, while the sum is 30.

The square root of 6438243 is about 2537.3693069792. The cubic root of 6438243 is about 186.0326281065.

The spelling of 6438243 in words is "six million, four hundred thirty-eight thousand, two hundred forty-three".