6644424 has 32 divisors (see below), whose sum is σ = 17334720. Its totient is φ = 2118336.

The previous prime is 6644413. The next prime is 6644431. The reversal of 6644424 is 4244466.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 6644391 and 6644400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5467 + ... + 6570.

It is an arithmetic number, because the mean of its divisors is an integer number (541710).

Almost surely, 2^6644424 is an apocalyptic number.

It is an amenable number.

6644424 is an abundant number, since it is smaller than the sum of its proper divisors (10690296).

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

6644424 is a wasteful number, since it uses less digits than its factorization.

6644424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12069 (or 12065 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 6644424 is about 2577.6780248898. The cubic root of 6644424 is about 187.9976610543.

The spelling of 6644424 in words is "six million, six hundred forty-four thousand, four hundred twenty-four".