11228287 has 8 divisors (see below), whose sum is σ = 12861056. Its totient is φ = 9602712.

The previous prime is 11228267. The next prime is 11228299. The reversal of 11228287 is 78282211.

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

It is a de Polignac number, because none of the positive numbers 2^k-11228287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11228207) 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, 2128 + ... + 5194.

It is an arithmetic number, because the mean of its divisors is an integer number (1607632).

Almost surely, 2^11228287 is an apocalyptic number.

11228287 is a deficient number, since it is larger than the sum of its proper divisors (1632769).

11228287 is an equidigital number, since it uses as much as digits as its factorization.

11228287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597.

The product of its digits is 3584, while the sum is 31.

The square root of 11228287 is about 3350.8636200239. The cubic root of 11228287 is about 223.9259893141.

It can be divided in two parts, 1122 and 8287, that added together give a square (9409 = 97²).

The spelling of 11228287 in words is "eleven million, two hundred twenty-eight thousand, two hundred eighty-seven".