11009440 has 96 divisors (see below), whose sum is σ = 28788480. Its totient is φ = 3953664.

The previous prime is 11009429. The next prime is 11009447. The reversal of 11009440 is 4490011.

It is a super-2 number, since 2×11009440² = 242415538227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11009447) 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, 139321 + ... + 139399.

It is an arithmetic number, because the mean of its divisors is an integer number (299880).

Almost surely, 2^11009440 is an apocalyptic number.

11009440 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 11009440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14394240).

11009440 is an abundant number, since it is smaller than the sum of its proper divisors (17779040).

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

11009440 is a wasteful number, since it uses less digits than its factorization.

11009440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 11009440 is about 3318.0476187059. The cubic root of 11009440 is about 222.4616101759.

Adding to 11009440 its reverse (4490011), we get a palindrome (15499451).

It can be divided in two parts, 11009 and 440, that added together give a square (11449 = 107²).

The spelling of 11009440 in words is "eleven million, nine thousand, four hundred forty".