6438279 has 4 divisors (see below), whose sum is σ = 8584376. Its totient is φ = 4292184.

The previous prime is 6438269. The next prime is 6438307. The reversal of 6438279 is 9728346.

6438279 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6438279 - 2⁷ = 6438151 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073044 + ... + 1073049.

It is an arithmetic number, because the mean of its divisors is an integer number (2146094).

Almost surely, 2^6438279 is an apocalyptic number.

6438279 is a deficient number, since it is larger than the sum of its proper divisors (2146097).

6438279 is a wasteful number, since it uses less digits than its factorization.

6438279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146096.

The product of its digits is 72576, while the sum is 39.

The square root of 6438279 is about 2537.3764009307. The cubic root of 6438279 is about 186.0329748451.

The spelling of 6438279 in words is "six million, four hundred thirty-eight thousand, two hundred seventy-nine".