11518540 has 48 divisors (see below), whose sum is σ = 27052704. Its totient is φ = 4083200.

The previous prime is 11518531. The next prime is 11518547. The reversal of 11518540 is 4581511.

It is a happy number.

11518540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11518547) 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, 8382 + ... + 9658.

It is an arithmetic number, because the mean of its divisors is an integer number (563598).

Almost surely, 2^11518540 is an apocalyptic number.

11518540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11518540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13526352).

11518540 is an abundant number, since it is smaller than the sum of its proper divisors (15534164).

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

11518540 is a wasteful number, since it uses less digits than its factorization.

11518540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 11518540 is about 3393.8974645678. The cubic root of 11518540 is about 225.8391054686.

The spelling of 11518540 in words is "eleven million, five hundred eighteen thousand, five hundred forty".