6443406 has 12 divisors (see below), whose sum is σ = 13960752. Its totient is φ = 2147796.

The previous prime is 6443399. The next prime is 6443407. The reversal of 6443406 is 6043446.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6443406.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 178966 + ... + 179001.

It is an arithmetic number, because the mean of its divisors is an integer number (1163396).

Almost surely, 2^6443406 is an apocalyptic number.

6443406 is an abundant number, since it is smaller than the sum of its proper divisors (7517346).

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

6443406 is a wasteful number, since it uses less digits than its factorization.

6443406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357975 (or 357972 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 6443406 is about 2538.3864953943. The cubic root of 6443406 is about 186.0823430068.

The spelling of 6443406 in words is "six million, four hundred forty-three thousand, four hundred six".