6439436 has 12 divisors (see below), whose sum is σ = 11355960. Its totient is φ = 3194880.

The previous prime is 6439427. The next prime is 6439439. The reversal of 6439436 is 6349346.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6439396 and 6439405.

It is not an unprimeable number, because it can be changed into a prime (6439439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5621 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (946330).

Almost surely, 2^6439436 is an apocalyptic number.

It is an amenable number.

6439436 is a deficient number, since it is larger than the sum of its proper divisors (4916524).

6439436 is a wasteful number, since it uses less digits than its factorization.

6439436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12424 (or 12422 counting only the distinct ones).

The product of its digits is 46656, while the sum is 35.

The square root of 6439436 is about 2537.6043820895. The cubic root of 6439436 is about 186.0441179503.

The spelling of 6439436 in words is "six million, four hundred thirty-nine thousand, four hundred thirty-six".