6444940 has 12 divisors (see below), whose sum is σ = 13534416. Its totient is φ = 2577968.

The previous prime is 6444937. The next prime is 6444941. The reversal of 6444940 is 494446.

It is not an unprimeable number, because it can be changed into a prime (6444941) 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 in 3 ways as a sum of consecutive naturals, for example, 161104 + ... + 161143.

It is an arithmetic number, because the mean of its divisors is an integer number (1127868).

Almost surely, 2^6444940 is an apocalyptic number.

It is an amenable number.

6444940 is an abundant number, since it is smaller than the sum of its proper divisors (7089476).

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

6444940 is a wasteful number, since it uses less digits than its factorization.

6444940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322256 (or 322254 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6444940 is about 2538.6886378601. The cubic root of 6444940 is about 186.0971088861.

The spelling of 6444940 in words is "six million, four hundred forty-four thousand, nine hundred forty".