11115680 has 24 divisors (see below), whose sum is σ = 26261172. Its totient is φ = 4446208.

The previous prime is 11115679. The next prime is 11115683. The reversal of 11115680 is 8651111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11102224 + 13456 = 3332^2 + 116^2 .

It is not an unprimeable number, because it can be changed into a prime (11115683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34577 + ... + 34896.

Almost surely, 2^11115680 is an apocalyptic number.

11115680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11115680 is an abundant number, since it is smaller than the sum of its proper divisors (15145492).

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

11115680 is an equidigital number, since it uses as much as digits as its factorization.

11115680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69488 (or 69480 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 11115680 is about 3334.0185962289. The cubic root of 11115680 is about 223.1748981504.

Adding to 11115680 its reverse (8651111), we get a palindrome (19766791).

The spelling of 11115680 in words is "eleven million, one hundred fifteen thousand, six hundred eighty".