11161280 has 56 divisors (see below), whose sum is σ = 28632912. Its totient is φ = 4119552.

The previous prime is 11161229. The next prime is 11161289. The reversal of 11161280 is 8216111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (11161289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2819 + ... + 5501.

It is an arithmetic number, because the mean of its divisors is an integer number (511302).

Almost surely, 2^11161280 is an apocalyptic number.

11161280 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 11161280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14316456).

11161280 is an abundant number, since it is smaller than the sum of its proper divisors (17471632).

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

11161280 is a wasteful number, since it uses less digits than its factorization.

11161280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2703 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 11161280 is about 3340.8501911939. The cubic root of 11161280 is about 223.4796595589.

Adding to 11161280 its reverse (8216111), we get a palindrome (19377391).

The spelling of 11161280 in words is "eleven million, one hundred sixty-one thousand, two hundred eighty".