11111238 has 48 divisors (see below), whose sum is σ = 25861680. Its totient is φ = 3436992.

The previous prime is 11111209. The next prime is 11111267. The reversal of 11111238 is 83211111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11111209) and next prime (11111267).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11111238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17820 + ... + 18432.

It is an arithmetic number, because the mean of its divisors is an integer number (538785).

Almost surely, 2^11111238 is an apocalyptic number.

11111238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12930840).

11111238 is an abundant number, since it is smaller than the sum of its proper divisors (14750442).

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

11111238 is a wasteful number, since it uses less digits than its factorization.

11111238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 690 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 11111238 is about 3333.3523666123. The cubic root of 11111238 is about 223.1451661269.

Adding to 11111238 its reverse (83211111), we get a palindrome (94322349).

The spelling of 11111238 in words is "eleven million, one hundred eleven thousand, two hundred thirty-eight".