6539646 has 8 divisors (see below), whose sum is σ = 13079304. Its totient is φ = 2179880.

The previous prime is 6539593. The next prime is 6539647. The reversal of 6539646 is 6469356.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

6539646 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544965 + ... + 544976.

It is an arithmetic number, because the mean of its divisors is an integer number (1634913).

Almost surely, 2^6539646 is an apocalyptic number.

6539646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6539646 is a wasteful number, since it uses less digits than its factorization.

6539646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089946.

The product of its digits is 116640, while the sum is 39.

The square root of 6539646 is about 2557.2731570953. The cubic root of 6539646 is about 187.0042226924.

The spelling of 6539646 in words is "six million, five hundred thirty-nine thousand, six hundred forty-six".