6406844 has 6 divisors (see below), whose sum is σ = 11211984. Its totient is φ = 3203420.

The previous prime is 6406831. The next prime is 6406847. The reversal of 6406844 is 4486046.

It is a self number, because there is not a number n which added to its sum of digits gives 6406844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406847) 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 as a sum of consecutive naturals, namely, 800852 + ... + 800859.

It is an arithmetic number, because the mean of its divisors is an integer number (1868664).

Almost surely, 2^6406844 is an apocalyptic number.

It is an amenable number.

6406844 is a deficient number, since it is larger than the sum of its proper divisors (4805140).

6406844 is a wasteful number, since it uses less digits than its factorization.

6406844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601715 (or 1601713 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 6406844 is about 2531.1744309707. The cubic root of 6406844 is about 185.7297110884.

The spelling of 6406844 in words is "six million, four hundred six thousand, eight hundred forty-four".