6489664 has 28 divisors (see below), whose sum is σ = 13297408. Its totient is φ = 3139200.

The previous prime is 6489653. The next prime is 6489667. The reversal of 6489664 is 4669846.

It is a self number, because there is not a number n which added to its sum of digits gives 6489664.

It is not an unprimeable number, because it can be changed into a prime (6489667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349 + ... + 3619.

Almost surely, 2^6489664 is an apocalyptic number.

6489664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6489664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6648704).

6489664 is an abundant number, since it is smaller than the sum of its proper divisors (6807744).

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

6489664 is a wasteful number, since it uses less digits than its factorization.

6489664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314 (or 3304 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 6489664 is about 2547.4818939494. The cubic root of 6489664 is about 186.5265842450.

The spelling of 6489664 in words is "six million, four hundred eighty-nine thousand, six hundred sixty-four".