6639246 has 48 divisors (see below), whose sum is σ = 15724800. Its totient is φ = 2093688.

The previous prime is 6639233. The next prime is 6639251. The reversal of 6639246 is 6429366.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6639246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8875 + ... + 9593.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

Almost surely, 2^6639246 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6639246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7862400).

6639246 is an abundant number, since it is smaller than the sum of its proper divisors (9085554).

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

6639246 is a wasteful number, since it uses less digits than its factorization.

6639246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 743 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 6639246 is about 2576.6734368173. The cubic root of 6639246 is about 187.9488128337.

The spelling of 6639246 in words is "six million, six hundred thirty-nine thousand, two hundred forty-six".