9638 has 8 divisors (see below), whose sum is σ = 14880. Its totient is φ = 4680.

The previous prime is 9631. The next prime is 9643. The reversal of 9638 is 8369.

It is a happy number.

9638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an alternating number because its digits alternate between odd and even.

9638 is an undulating number in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9631) by changing a digit.

9638 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 83 + ... + 161.

It is an arithmetic number, because the mean of its divisors is an integer number (1860).

2⁹⁶³⁸ is an apocalyptic number.

9638 is a deficient number, since it is larger than the sum of its proper divisors (5242).

9638 is a wasteful number, since it uses less digits than its factorization.

9638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142.

The product of its digits is 1296, while the sum is 26.

The square root of 9638 is about 98.1733161302. The cubic root of 9638 is about 21.2811768434.

The spelling of 9638 in words is "nine thousand, six hundred thirty-eight".