11531238 has 8 divisors (see below), whose sum is σ = 23062488. Its totient is φ = 3843744.

The previous prime is 11531231. The next prime is 11531239. The reversal of 11531238 is 83213511.

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

11531238 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960931 + ... + 960942.

It is an arithmetic number, because the mean of its divisors is an integer number (2882811).

Almost surely, 2^11531238 is an apocalyptic number.

11531238 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.

11531238 is a wasteful number, since it uses less digits than its factorization.

11531238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921878.

The product of its digits is 720, while the sum is 24.

The square root of 11531238 is about 3395.7676598967. The cubic root of 11531238 is about 225.9220630837.

Adding to 11531238 its reverse (83213511), we get a palindrome (94744749).

The spelling of 11531238 in words is "eleven million, five hundred thirty-one thousand, two hundred thirty-eight".