6397944 has 32 divisors (see below), whose sum is σ = 18280320. Its totient is φ = 1827936.

The previous prime is 6397921. The next prime is 6397949. The reversal of 6397944 is 4497936.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 6397896 and 6397905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18874 + ... + 19209.

It is an arithmetic number, because the mean of its divisors is an integer number (571260).

Almost surely, 2^6397944 is an apocalyptic number.

It is an amenable number.

6397944 is an abundant number, since it is smaller than the sum of its proper divisors (11882376).

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

6397944 is a wasteful number, since it uses less digits than its factorization.

6397944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38099 (or 38095 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 6397944 is about 2529.4157428149. The cubic root of 6397944 is about 185.6436697430.

The spelling of 6397944 in words is "six million, three hundred ninety-seven thousand, nine hundred forty-four".