6396444 has 18 divisors (see below), whose sum is σ = 16168880. Its totient is φ = 2132136.

The previous prime is 6396433. The next prime is 6396463. The reversal of 6396444 is 4446936.

6396444 is a `hidden beast` number, since 6 + 3 + 9 + 644 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 177679 = 6396444 / (6 + 3 + 9 + 6 + 4 + 4 + 4).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6396399 and 6396408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88804 + ... + 88875.

Almost surely, 2^6396444 is an apocalyptic number.

It is an amenable number.

6396444 is an abundant number, since it is smaller than the sum of its proper divisors (9772436).

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

6396444 is a wasteful number, since it uses less digits than its factorization.

6396444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177689 (or 177684 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 6396444 is about 2529.1192142720. The cubic root of 6396444 is about 185.6291605366.

The spelling of 6396444 in words is "six million, three hundred ninety-six thousand, four hundred forty-four".