6443424 has 72 divisors (see below), whose sum is σ = 19744452. Its totient is φ = 1981440.

The previous prime is 6443417. The next prime is 6443429. The reversal of 6443424 is 4243446.

It can be written as a sum of positive squares in 2 ways, for example, as 6411024 + 32400 = 2532^2 + 180^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (6443429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2884 + ... + 4604.

Almost surely, 2^6443424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6443424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9872226).

6443424 is an abundant number, since it is smaller than the sum of its proper divisors (13301028).

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

6443424 is a wasteful number, since it uses less digits than its factorization.

6443424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750 (or 1739 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 6443424 is about 2538.3900409512. The cubic root of 6443424 is about 186.0825162837.

The spelling of 6443424 in words is "six million, four hundred forty-three thousand, four hundred twenty-four".