6486444 has 18 divisors (see below), whose sum is σ = 16396380. Its totient is φ = 2162136.

The previous prime is 6486443. The next prime is 6486461. The reversal of 6486444 is 4446846.

6486444 is a `hidden beast` number, since 6 + 4 + 8 + 644 + 4 = 666.

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

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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: 180179 = 6486444 / (6 + 4 + 8 + 6 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 6486399 and 6486408.

It is not an unprimeable number, because it can be changed into a prime (6486443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90054 + ... + 90125.

It is an arithmetic number, because the mean of its divisors is an integer number (910910).

Almost surely, 2^6486444 is an apocalyptic number.

It is an amenable number.

6486444 is an abundant number, since it is smaller than the sum of its proper divisors (9909936).

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

6486444 is a wasteful number, since it uses less digits than its factorization.

6486444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180189 (or 180184 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 6486444 is about 2546.8498188939. The cubic root of 6486444 is about 186.4957292852.

The spelling of 6486444 in words is "six million, four hundred eighty-six thousand, four hundred forty-four".