11287289 has 8 divisors (see below), whose sum is σ = 12337920. Its totient is φ = 10262736.

The previous prime is 11287279. The next prime is 11287291. The reversal of 11287289 is 98278211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11287289 - 2¹² = 11283193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11287229) 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, 5609 + ... + 7350.

It is an arithmetic number, because the mean of its divisors is an integer number (1542240).

Almost surely, 2^11287289 is an apocalyptic number.

It is an amenable number.

11287289 is a deficient number, since it is larger than the sum of its proper divisors (1050631).

11287289 is a wasteful number, since it uses less digits than its factorization.

11287289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13039.

The product of its digits is 16128, while the sum is 38.

The square root of 11287289 is about 3359.6560835895. The cubic root of 11287289 is about 224.3175303812.

The spelling of 11287289 in words is "eleven million, two hundred eighty-seven thousand, two hundred eighty-nine".