6539868 has 36 divisors (see below), whose sum is σ = 16609320. Its totient is φ = 2169696.

The previous prime is 6539867. The next prime is 6539873. The reversal of 6539868 is 8689356.

6539868 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539867) 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, 13771 + ... + 14237.

It is an arithmetic number, because the mean of its divisors is an integer number (461370).

Almost surely, 2^6539868 is an apocalyptic number.

It is an amenable number.

6539868 is an abundant number, since it is smaller than the sum of its proper divisors (10069452).

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

6539868 is a wasteful number, since it uses less digits than its factorization.

6539868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 861 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 6539868 is about 2557.3165623364. The cubic root of 6539868 is about 187.0063387330.

The spelling of 6539868 in words is "six million, five hundred thirty-nine thousand, eight hundred sixty-eight".