11240 has 16 divisors (see below), whose sum is σ = 25380. Its totient is φ = 4480.

The previous prime is 11239. The next prime is 11243. The reversal of 11240 is 4211.

It can be written as a sum of positive squares in 2 ways, for example, as 11236 + 4 = 106^2 + 2^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11243) 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, 101 + ... + 180.

2¹¹²⁴⁰ is an apocalyptic number.

11240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11240 is an abundant number, since it is smaller than the sum of its proper divisors (14140).

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 (12690).

11240 is a wasteful number, since it uses less digits than its factorization.

11240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 11240 is about 106.0188662456. The cubic root of 11240 is about 22.4003826465.

Adding to 11240 its reverse (4211), we get a palindrome (15451).

The spelling of 11240 in words is "eleven thousand, two hundred forty", and thus it is an iban number.