11163880 has 64 divisors (see below), whose sum is σ = 30925440. Its totient is φ = 3532032.

The previous prime is 11163877. The next prime is 11163907. The reversal of 11163880 is 8836111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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, 2107 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (483210).

Almost surely, 2^11163880 is an apocalyptic number.

11163880 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 11163880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15462720).

11163880 is an abundant number, since it is smaller than the sum of its proper divisors (19761560).

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

11163880 is a wasteful number, since it uses less digits than its factorization.

11163880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098 (or 3094 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 11163880 is about 3341.2392910416. The cubic root of 11163880 is about 223.4970112725.

Adding to 11163880 its reverse (8836111), we get a palindrome (19999991).

The spelling of 11163880 in words is "eleven million, one hundred sixty-three thousand, eight hundred eighty".