9840638 has 8 divisors (see below), whose sum is σ = 14784120. Its totient is φ = 4912600.

The previous prime is 9840617. The next prime is 9840643. The reversal of 9840638 is 8360489.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2108 + ... + 4911.

It is an arithmetic number, because the mean of its divisors is an integer number (1848015).

Almost surely, 2^9840638 is an apocalyptic number.

9840638 is a deficient number, since it is larger than the sum of its proper divisors (4943482).

9840638 is a wasteful number, since it uses less digits than its factorization.

9840638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 9840638 is about 3136.9791201090. The cubic root of 9840638 is about 214.2928851357.

The spelling of 9840638 in words is "nine million, eight hundred forty thousand, six hundred thirty-eight".