8439638 has 8 divisors (see below), whose sum is σ = 13096080. Its totient is φ = 4074280.

The previous prime is 8439637. The next prime is 8439647. The reversal of 8439638 is 8369348.

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

It is a junction number, because it is equal to n+sod(n) for n = 8439595 and 8439604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8439637) 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, 72698 + ... + 72813.

It is an arithmetic number, because the mean of its divisors is an integer number (1637010).

Almost surely, 2^8439638 is an apocalyptic number.

8439638 is a deficient number, since it is larger than the sum of its proper divisors (4656442).

8439638 is a wasteful number, since it uses less digits than its factorization.

8439638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145542.

The product of its digits is 124416, while the sum is 41.

The square root of 8439638 is about 2905.1055058293. The cubic root of 8439638 is about 203.5985151254.

The spelling of 8439638 in words is "eight million, four hundred thirty-nine thousand, six hundred thirty-eight".