11172180 has 48 divisors (see below), whose sum is σ = 31691520. Its totient is φ = 2940288.

The previous prime is 11172157. The next prime is 11172193. The reversal of 11172180 is 8127111.

11172180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3562 + ... + 5918.

It is an arithmetic number, because the mean of its divisors is an integer number (660240).

Almost surely, 2^11172180 is an apocalyptic number.

11172180 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 11172180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15845760).

11172180 is an abundant number, since it is smaller than the sum of its proper divisors (20519340).

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

11172180 is a wasteful number, since it uses less digits than its factorization.

11172180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448 (or 2446 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 21.

The square root of 11172180 is about 3342.4811143819. The cubic root of 11172180 is about 223.5523852603.

Adding to 11172180 its reverse (8127111), we get a palindrome (19299291).

The spelling of 11172180 in words is "eleven million, one hundred seventy-two thousand, one hundred eighty".