6444398 has 4 divisors (see below), whose sum is σ = 9666600. Its totient is φ = 3222198.

The previous prime is 6444391. The next prime is 6444413. The reversal of 6444398 is 8934446.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611098 + ... + 1611101.

It is an arithmetic number, because the mean of its divisors is an integer number (2416650).

Almost surely, 2^6444398 is an apocalyptic number.

6444398 is a deficient number, since it is larger than the sum of its proper divisors (3222202).

6444398 is a wasteful number, since it uses less digits than its factorization.

6444398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222201.

The product of its digits is 82944, while the sum is 38.

The square root of 6444398 is about 2538.5818875900. The cubic root of 6444398 is about 186.0918920048.

The spelling of 6444398 in words is "six million, four hundred forty-four thousand, three hundred ninety-eight".