228329 has 4 divisors (see below), whose sum is σ = 233940. Its totient is φ = 222720.

The previous prime is 228311. The next prime is 228331. The reversal of 228329 is 923822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24025 + 204304 = 155^2 + 452^2 .

It is a cyclic number.

It is not a de Polignac number, because 228329 - 2¹² = 224233 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 228298 and 228307.

It is not an unprimeable number, because it can be changed into a prime (228359) 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 3 ways as a sum of consecutive naturals, for example, 2744 + ... + 2825.

It is an arithmetic number, because the mean of its divisors is an integer number (58485).

2²²⁸³²⁹ is an apocalyptic number.

It is an amenable number.

228329 is a deficient number, since it is larger than the sum of its proper divisors (5611).

228329 is an equidigital number, since it uses as much as digits as its factorization.

228329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610.

The product of its digits is 1728, while the sum is 26.

The square root of 228329 is about 477.8378386022. The cubic root of 228329 is about 61.1205178051.

The spelling of 228329 in words is "two hundred twenty-eight thousand, three hundred twenty-nine".