6509868 has 12 divisors (see below), whose sum is σ = 15189720. Its totient is φ = 2169952.

The previous prime is 6509863. The next prime is 6509869. The reversal of 6509868 is 8689056.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (6509863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271233 + ... + 271256.

It is an arithmetic number, because the mean of its divisors is an integer number (1265810).

Almost surely, 2^6509868 is an apocalyptic number.

It is an amenable number.

6509868 is an abundant number, since it is smaller than the sum of its proper divisors (8679852).

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

6509868 is a wasteful number, since it uses less digits than its factorization.

6509868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542496 (or 542494 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 6509868 is about 2551.4442968640. Note that the first 3 decimals coincide. The cubic root of 6509868 is about 186.7199521914.

The spelling of 6509868 in words is "six million, five hundred nine thousand, eight hundred sixty-eight".