228289 has 4 divisors (see below), whose sum is σ = 229824. Its totient is φ = 226756.

The previous prime is 228281. The next prime is 228299. The reversal of 228289 is 982822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228289 - 2³ = 228281 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228289.

It is not an unprimeable number, because it can be changed into a prime (228281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517 + ... + 850.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2²²⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

228289 is a deficient number, since it is larger than the sum of its proper divisors (1535).

228289 is a wasteful number, since it uses less digits than its factorization.

228289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534.

The product of its digits is 4608, while the sum is 31.

The square root of 228289 is about 477.7959815654. The cubic root of 228289 is about 61.1169484476.

The spelling of 228289 in words is "two hundred twenty-eight thousand, two hundred eighty-nine".