6443956 has 24 divisors (see below), whose sum is σ = 11914560. Its totient is φ = 3043392.

The previous prime is 6443953. The next prime is 6443959. The reversal of 6443956 is 6593446.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6443953) and next prime (6443959).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443953) 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 7 ways as a sum of consecutive naturals, for example, 7795 + ... + 8581.

It is an arithmetic number, because the mean of its divisors is an integer number (496440).

Almost surely, 2^6443956 is an apocalyptic number.

It is an amenable number.

6443956 is a deficient number, since it is larger than the sum of its proper divisors (5470604).

6443956 is a wasteful number, since it uses less digits than its factorization.

6443956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903 (or 901 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 6443956 is about 2538.4948296185. The cubic root of 6443956 is about 186.0876374312.

The spelling of 6443956 in words is "six million, four hundred forty-three thousand, nine hundred fifty-six".