11143660 has 48 divisors (see below), whose sum is σ = 26238240. Its totient is φ = 3942720.

The previous prime is 11143631. The next prime is 11143667. The reversal of 11143660 is 6634111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301162 + ... + 301198.

It is an arithmetic number, because the mean of its divisors is an integer number (546630).

Almost surely, 2^11143660 is an apocalyptic number.

11143660 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 11143660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13119120).

11143660 is an abundant number, since it is smaller than the sum of its proper divisors (15094580).

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

11143660 is an equidigital number, since it uses as much as digits as its factorization.

11143660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 11143660 is about 3338.2120963174. The cubic root of 11143660 is about 223.3619972615.

Adding to 11143660 its reverse (6634111), we get a palindrome (17777771).

It can be divided in two parts, 1114 and 3660, that added together give a palindrome (4774).

The spelling of 11143660 in words is "eleven million, one hundred forty-three thousand, six hundred sixty".