11958 has 8 divisors (see below), whose sum is σ = 23928. Its totient is φ = 3984.

The previous prime is 11953. The next prime is 11959. The reversal of 11958 is 85911.

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

11958 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11953) 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, 991 + ... + 1002.

It is an arithmetic number, because the mean of its divisors is an integer number (2991).

2¹¹⁹⁵⁸ is an apocalyptic number.

11958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11964).

11958 is a wasteful number, since it uses less digits than its factorization.

11958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998.

The product of its digits is 360, while the sum is 24.

The square root of 11958 is about 109.3526405717. The cubic root of 11958 is about 22.8675436297.

It can be divided in two parts, 11 and 958, that added together give a palindrome (969).

The spelling of 11958 in words is "eleven thousand, nine hundred fifty-eight".