6444998 has 16 divisors (see below), whose sum is σ = 11215104. Its totient is φ = 2720520.

The previous prime is 6444979. The next prime is 6445003. The reversal of 6444998 is 8994446.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2498 + ... + 4373.

It is an arithmetic number, because the mean of its divisors is an integer number (700944).

Almost surely, 2^6444998 is an apocalyptic number.

6444998 is a deficient number, since it is larger than the sum of its proper divisors (4770106).

6444998 is a wasteful number, since it uses less digits than its factorization.

6444998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6947.

The product of its digits is 248832, while the sum is 44.

The square root of 6444998 is about 2538.7000610549. The cubic root of 6444998 is about 186.0976671328.

The spelling of 6444998 in words is "six million, four hundred forty-four thousand, nine hundred ninety-eight".