6221844 has 18 divisors (see below), whose sum is σ = 15727530. Its totient is φ = 2073936.

The previous prime is 6221837. The next prime is 6221849. The reversal of 6221844 is 4481226.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 2762244 = 1860^2 + 1662^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×6221844² = 77422685520672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221849) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 86379 + ... + 86450.

Almost surely, 2^6221844 is an apocalyptic number.

It is an amenable number.

6221844 is an abundant number, since it is smaller than the sum of its proper divisors (9505686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6221844 is a wasteful number, since it uses less digits than its factorization.

6221844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172839 (or 172834 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 6221844 is about 2494.3624435915. The cubic root of 6221844 is about 183.9245516126.

The spelling of 6221844 in words is "six million, two hundred twenty-one thousand, eight hundred forty-four".