6639432 has 32 divisors (see below), whose sum is σ = 16850400. Its totient is φ = 2179584.

The previous prime is 6639407. The next prime is 6639439. The reversal of 6639432 is 2349366.

It is a junction number, because it is equal to n+sod(n) for n = 6639393 and 6639402.

It is not an unprimeable number, because it can be changed into a prime (6639439) 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 7 ways as a sum of consecutive naturals, for example, 457 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (526575).

Almost surely, 2^6639432 is an apocalyptic number.

It is an amenable number.

6639432 is an abundant number, since it is smaller than the sum of its proper divisors (10210968).

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

6639432 is a wasteful number, since it uses less digits than its factorization.

6639432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205 (or 4201 counting only the distinct ones).

The product of its digits is 23328, while the sum is 33.

The square root of 6639432 is about 2576.7095296133. The cubic root of 6639432 is about 187.9505679603.

It can be divided in two parts, 663 and 9432, that multiplied together give a triangular number (6253416 = T₃₅₃₆).

The spelling of 6639432 in words is "six million, six hundred thirty-nine thousand, four hundred thirty-two".