6444994 has 8 divisors (see below), whose sum is σ = 9683388. Its totient is φ = 3217200.

The previous prime is 6444979. The next prime is 6445003. The reversal of 6444994 is 4994446.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6426225 + 18769 = 2535^2 + 137^2 .

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

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, 897 + ... + 3700.

Almost surely, 2^6444994 is an apocalyptic number.

6444994 is a deficient number, since it is larger than the sum of its proper divisors (3238394).

6444994 is a wasteful number, since it uses less digits than its factorization.

6444994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300.

The product of its digits is 124416, while the sum is 40.

The square root of 6444994 is about 2538.6992732500. The cubic root of 6444994 is about 186.0976286331.

The spelling of 6444994 in words is "six million, four hundred forty-four thousand, nine hundred ninety-four".