11528289 has 6 divisors (see below), whose sum is σ = 16651986. Its totient is φ = 7685520.

The previous prime is 11528281. The next prime is 11528317. The reversal of 11528289 is 98282511.

It can be written as a sum of positive squares in only one way, i.e., 6275025 + 5253264 = 2505^2 + 2292^2 .

It is not a de Polignac number, because 11528289 - 2³ = 11528281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11528281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 640452 + ... + 640469.

It is an arithmetic number, because the mean of its divisors is an integer number (2775331).

Almost surely, 2^11528289 is an apocalyptic number.

It is an amenable number.

11528289 is a deficient number, since it is larger than the sum of its proper divisors (5123697).

11528289 is a wasteful number, since it uses less digits than its factorization.

11528289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280927 (or 1280924 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 11528289 is about 3395.3334151450. Note that the first 3 decimals coincide. The cubic root of 11528289 is about 225.9028023311.

The spelling of 11528289 in words is "eleven million, five hundred twenty-eight thousand, two hundred eighty-nine".