11161880 has 16 divisors (see below), whose sum is σ = 25114320. Its totient is φ = 4464736.

The previous prime is 11161879. The next prime is 11161907. The reversal of 11161880 is 8816111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139484 + ... + 139563.

It is an arithmetic number, because the mean of its divisors is an integer number (1569645).

Almost surely, 2^11161880 is an apocalyptic number.

11161880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11161880 is an abundant number, since it is smaller than the sum of its proper divisors (13952440).

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

11161880 is a wasteful number, since it uses less digits than its factorization.

11161880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279058 (or 279054 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 26.

The square root of 11161880 is about 3340.9399874886. The cubic root of 11161880 is about 223.4836640396.

Adding to 11161880 its reverse (8816111), we get a palindrome (19977991).

The spelling of 11161880 in words is "eleven million, one hundred sixty-one thousand, eight hundred eighty".