9438 has 24 divisors (see below), whose sum is σ = 22344. Its totient is φ = 2640.

The previous prime is 9437. The next prime is 9439. The reversal of 9438 is 8349.

It is an interprime number because it is at equal distance from previous prime (9437) and next prime (9439).

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

It is a plaindrome in base 8, base 12 and base 16.

It is a nialpdrome in base 11.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720 + ... + 732.

It is an arithmetic number, because the mean of its divisors is an integer number (931).

2⁹⁴³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11172).

9438 is an abundant number, since it is smaller than the sum of its proper divisors (12906).

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

9438 is a wasteful number, since it uses less digits than its factorization.

9438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40 (or 29 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 9438 is about 97.1493695296. The cubic root of 9438 is about 21.1329434548.

Subtracting from 9438 its reverse (8349), we obtain a square (1089 = 33²).

The spelling of 9438 in words is "nine thousand, four hundred thirty-eight".