6639832 has 8 divisors (see below), whose sum is σ = 12449700. Its totient is φ = 3319912.

The previous prime is 6639823. The next prime is 6639833. The reversal of 6639832 is 2389366.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 6639791 and 6639800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414982 + ... + 414997.

Almost surely, 2^6639832 is an apocalyptic number.

It is an amenable number.

6639832 is a deficient number, since it is larger than the sum of its proper divisors (5809868).

6639832 is a wasteful number, since it uses less digits than its factorization.

6639832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829985 (or 829981 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 6639832 is about 2576.7871468167. The cubic root of 6639832 is about 187.9543423152.

It can be divided in two parts, 66398 and 32, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 6639832 in words is "six million, six hundred thirty-nine thousand, eight hundred thirty-two".