11217240 has 48 divisors (see below), whose sum is σ = 36457200. Its totient is φ = 2991168.

The previous prime is 11217233. The next prime is 11217251. The reversal of 11217240 is 4271211.

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

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 11 ways as a sum of consecutive naturals, for example, 15220 + ... + 15939.

It is an arithmetic number, because the mean of its divisors is an integer number (759525).

Almost surely, 2^11217240 is an apocalyptic number.

11217240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11217240 is an abundant number, since it is smaller than the sum of its proper divisors (25239960).

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

11217240 is a wasteful number, since it uses less digits than its factorization.

11217240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31176 (or 31169 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 11217240 is about 3349.2148333602. The cubic root of 11217240 is about 223.8525283577.

Adding to 11217240 its reverse (4271211), we get a palindrome (15488451).

The spelling of 11217240 in words is "eleven million, two hundred seventeen thousand, two hundred forty".