6445438 has 8 divisors (see below), whose sum is σ = 9711432. Its totient is φ = 3208296.

The previous prime is 6445433. The next prime is 6445441. The reversal of 6445438 is 8345446.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6645 + ... + 7552.

It is an arithmetic number, because the mean of its divisors is an integer number (1213929).

Almost surely, 2^6445438 is an apocalyptic number.

6445438 is a deficient number, since it is larger than the sum of its proper divisors (3265994).

6445438 is a wasteful number, since it uses less digits than its factorization.

6445438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14426.

The product of its digits is 46080, while the sum is 34.

The square root of 6445438 is about 2538.7867180998. The cubic root of 6445438 is about 186.1019019989.

The spelling of 6445438 in words is "six million, four hundred forty-five thousand, four hundred thirty-eight".