6443408 has 20 divisors (see below), whose sum is σ = 13219020. Its totient is φ = 3032064.

The previous prime is 6443407. The next prime is 6443417. The reversal of 6443408 is 8043446.

It can be written as a sum of positive squares in 2 ways, for example, as 2166784 + 4276624 = 1472^2 + 2068^2 .

It is not an unprimeable number, because it can be changed into a prime (6443407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11573 + ... + 12116.

It is an arithmetic number, because the mean of its divisors is an integer number (660951).

Almost surely, 2^6443408 is an apocalyptic number.

6443408 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6443408 is an abundant number, since it is smaller than the sum of its proper divisors (6775612).

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

6443408 is a wasteful number, since it uses less digits than its factorization.

6443408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23714 (or 23708 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 6443408 is about 2538.3868893453. The cubic root of 6443408 is about 186.0823622598.

The spelling of 6443408 in words is "six million, four hundred forty-three thousand, four hundred eight".