6489864 has 48 divisors (see below), whose sum is σ = 18345600. Its totient is φ = 2068704.

The previous prime is 6489863. The next prime is 6489877. The reversal of 6489864 is 4689846.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (6489863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304 + ... + 3615.

It is an arithmetic number, because the mean of its divisors is an integer number (382200).

Almost surely, 2^6489864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6489864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9172800).

6489864 is an abundant number, since it is smaller than the sum of its proper divisors (11855736).

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

6489864 is a wasteful number, since it uses less digits than its factorization.

6489864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954 (or 3947 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6489864 is about 2547.5211480967. The cubic root of 6489864 is about 186.5285003655.

The spelling of 6489864 in words is "six million, four hundred eighty-nine thousand, eight hundred sixty-four".