11281218 has 32 divisors (see below), whose sum is σ = 24706752. Its totient is φ = 3412800.

The previous prime is 11281211. The next prime is 11281243. The reversal of 11281218 is 81218211.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11281211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3573 + ... + 5943.

It is an arithmetic number, because the mean of its divisors is an integer number (772086).

Almost surely, 2^11281218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11281218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12353376).

11281218 is an abundant number, since it is smaller than the sum of its proper divisors (13425534).

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

11281218 is a wasteful number, since it uses less digits than its factorization.

11281218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450.

The product of its digits is 256, while the sum is 24.

The square root of 11281218 is about 3358.7524469660. The cubic root of 11281218 is about 224.2773059022.

Adding to 11281218 its reverse (81218211), we get a palindrome (92499429).

It can be divided in two parts, 1128 and 1218, that added together give a triangular number (2346 = T₆₈).

The spelling of 11281218 in words is "eleven million, two hundred eighty-one thousand, two hundred eighteen".