9558 has 20 divisors (see below), whose sum is σ = 21780. Its totient is φ = 3132.

The previous prime is 9551. The next prime is 9587. The reversal of 9558 is 8559.

9558 is nontrivially palindromic in base 4.

9558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9551) 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 9 ways as a sum of consecutive naturals, for example, 133 + ... + 191.

It is an arithmetic number, because the mean of its divisors is an integer number (1089).

2⁹⁵⁵⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10890).

9558 is an abundant number, since it is smaller than the sum of its proper divisors (12222).

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

9558 is a wasteful number, since it uses less digits than its factorization.

9558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 64 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 9558 is about 97.7650244208. The cubic root of 9558 is about 21.2221318653. Note that the first 3 decimals are identical.

Subtracting from 9558 its reverse (8559), we obtain a palindrome (999).

It can be divided in two parts, 95 and 58, that added together give a triangular number (153 = T₁₇).

The spelling of 9558 in words is "nine thousand, five hundred fifty-eight".