11223540 has 72 divisors (see below), whose sum is σ = 35538048. Its totient is φ = 2861760.

The previous prime is 11223539. The next prime is 11223557. The reversal of 11223540 is 4532211.

11223540 is a `hidden beast` number, since 1 + 122 + 3 + 540 = 666.

11223540 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2785 + ... + 5495.

It is an arithmetic number, because the mean of its divisors is an integer number (493584).

Almost surely, 2^11223540 is an apocalyptic number.

11223540 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 11223540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17769024).

11223540 is an abundant number, since it is smaller than the sum of its proper divisors (24314508).

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

11223540 is a wasteful number, since it uses less digits than its factorization.

11223540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749 (or 2744 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 11223540 is about 3350.1552202846. The cubic root of 11223540 is about 223.8944283554.

Adding to 11223540 its reverse (4532211), we get a palindrome (15755751).

The spelling of 11223540 in words is "eleven million, two hundred twenty-three thousand, five hundred forty".