6444418 has 4 divisors (see below), whose sum is σ = 9666630. Its totient is φ = 3222208.

The previous prime is 6444413. The next prime is 6444437. The reversal of 6444418 is 8144446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8144446 = 2 ⋅4072223.

It can be written as a sum of positive squares in only one way, i.e., 4464769 + 1979649 = 2113^2 + 1407^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6444418.

It is not an unprimeable number, because it can be changed into a prime (6444413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611103 + ... + 1611106.

Almost surely, 2^6444418 is an apocalyptic number.

6444418 is a deficient number, since it is larger than the sum of its proper divisors (3222212).

6444418 is a wasteful number, since it uses less digits than its factorization.

6444418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222211.

The product of its digits is 12288, while the sum is 31.

The square root of 6444418 is about 2538.5858267941. The cubic root of 6444418 is about 186.0920845148.

The spelling of 6444418 in words is "six million, four hundred forty-four thousand, four hundred eighteen".