6623444 has 12 divisors (see below), whose sum is σ = 11904564. Its totient is φ = 3222144.

The previous prime is 6623423. The next prime is 6623459. The reversal of 6623444 is 4443266.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4251844 + 2371600 = 2062^2 + 1540^2 .

It is a super-2 number, since 2×6623444² = 87740020842272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22229 + ... + 22524.

It is an arithmetic number, because the mean of its divisors is an integer number (992047).

Almost surely, 2^6623444 is an apocalyptic number.

It is an amenable number.

6623444 is a deficient number, since it is larger than the sum of its proper divisors (5281120).

6623444 is a wasteful number, since it uses less digits than its factorization.

6623444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44794 (or 44792 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 6623444 is about 2573.6052533363. The cubic root of 6623444 is about 187.7995827091.

The spelling of 6623444 in words is "six million, six hundred twenty-three thousand, four hundred forty-four".