6445244 has 48 divisors (see below), whose sum is σ = 13462848. Its totient is φ = 2669568.

The previous prime is 6445223. The next prime is 6445247. The reversal of 6445244 is 4425446.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445247) 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 15 ways as a sum of consecutive naturals, for example, 20174 + ... + 20490.

It is an arithmetic number, because the mean of its divisors is an integer number (280476).

Almost surely, 2^6445244 is an apocalyptic number.

It is an amenable number.

6445244 is an abundant number, since it is smaller than the sum of its proper divisors (7017604).

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

6445244 is a wasteful number, since it uses less digits than its factorization.

6445244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 372 counting only the distinct ones).

The product of its digits is 15360, while the sum is 29.

The square root of 6445244 is about 2538.7485105855. The cubic root of 6445244 is about 186.1000348317.

The spelling of 6445244 in words is "six million, four hundred forty-five thousand, two hundred forty-four".