6445238 has 8 divisors (see below), whose sum is σ = 9804240. Its totient is φ = 3177160.

The previous prime is 6445223. The next prime is 6445247. The reversal of 6445238 is 8325446.

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

It is a d-powerful number, because it can be written as 6³ + 4⁷ + 4¹¹ + 5⁷ + 2²¹ + 3¹⁰ + 8 .

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 22553 + ... + 22836.

It is an arithmetic number, because the mean of its divisors is an integer number (1225530).

Almost surely, 2^6445238 is an apocalyptic number.

6445238 is a deficient number, since it is larger than the sum of its proper divisors (3359002).

6445238 is a wasteful number, since it uses less digits than its factorization.

6445238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45462.

The product of its digits is 23040, while the sum is 32.

The square root of 6445238 is about 2538.7473289006. The cubic root of 6445238 is about 186.0999770836.

The spelling of 6445238 in words is "six million, four hundred forty-five thousand, two hundred thirty-eight".