11136440 has 64 divisors (see below), whose sum is σ = 29583360. Its totient is φ = 3692160.

The previous prime is 11136431. The next prime is 11136443. The reversal of 11136440 is 4463111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11136443) 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, 8039 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (462240).

Almost surely, 2^11136440 is an apocalyptic number.

11136440 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 11136440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14791680).

11136440 is an abundant number, since it is smaller than the sum of its proper divisors (18446920).

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

11136440 is a wasteful number, since it uses less digits than its factorization.

11136440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 11136440 is about 3337.1305038910. The cubic root of 11136440 is about 223.3137479422.

Adding to 11136440 its reverse (4463111), we get a palindrome (15599551).

The spelling of 11136440 in words is "eleven million, one hundred thirty-six thousand, four hundred forty".