11689280 has 28 divisors (see below), whose sum is σ = 27835860. Its totient is φ = 4675584.

The previous prime is 11689277. The next prime is 11689303. The reversal of 11689280 is 8298611.

It can be written as a sum of positive squares in 2 ways, for example, as 6635776 + 5053504 = 2576^2 + 2248^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11689280.

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, 17945 + ... + 18584.

Almost surely, 2^11689280 is an apocalyptic number.

11689280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11689280 is an abundant number, since it is smaller than the sum of its proper divisors (16146580).

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

11689280 is an equidigital number, since it uses as much as digits as its factorization.

11689280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36546 (or 36536 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 11689280 is about 3418.9589058659. The cubic root of 11689280 is about 226.9495123410.

The spelling of 11689280 in words is "eleven million, six hundred eighty-nine thousand, two hundred eighty".