228889 has 4 divisors (see below), whose sum is σ = 234256. Its totient is φ = 223524.

The previous prime is 228887. The next prime is 228901. The reversal of 228889 is 988822.

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 228889 - 2¹ = 228887 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (228881) 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, 2619 + ... + 2704.

It is an arithmetic number, because the mean of its divisors is an integer number (58564).

2²²⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

228889 is a deficient number, since it is larger than the sum of its proper divisors (5367).

228889 is an equidigital number, since it uses as much as digits as its factorization.

228889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5366.

The product of its digits is 18432, while the sum is 37.

The square root of 228889 is about 478.4234526024. The cubic root of 228889 is about 61.1704450970.

It can be divided in two parts, 22 and 8889, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 228889 in words is "two hundred twenty-eight thousand, eight hundred eighty-nine".