11143440 has 320 divisors, whose sum is σ = 48568320. Its totient is φ = 2280960.

The previous prime is 11143427. The next prime is 11143463. The reversal of 11143440 is 4434111.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166287 + ... + 166353.

It is an arithmetic number, because the mean of its divisors is an integer number (151776).

Almost surely, 2^11143440 is an apocalyptic number.

11143440 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 11143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24284160).

11143440 is an abundant number, since it is smaller than the sum of its proper divisors (37424880).

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

11143440 is a wasteful number, since it uses less digits than its factorization.

11143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 11143440 is about 3338.1791443840. The cubic root of 11143440 is about 223.3605273685.

Adding to 11143440 its reverse (4434111), we get a palindrome (15577551).

It can be divided in two parts, 1114 and 3440, that added together give a palindrome (4554).

The spelling of 11143440 in words is "eleven million, one hundred forty-three thousand, four hundred forty".