228439 has 4 divisors (see below), whose sum is σ = 235840. Its totient is φ = 221040.

The previous prime is 228427. The next prime is 228443. The reversal of 228439 is 934822.

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

It is a cyclic number.

It is not a de Polignac number, because 228439 - 2⁷ = 228311 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 (228409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3654 + ... + 3715.

It is an arithmetic number, because the mean of its divisors is an integer number (58960).

2²²⁸⁴³⁹ is an apocalyptic number.

228439 is a deficient number, since it is larger than the sum of its proper divisors (7401).

228439 is an equidigital number, since it uses as much as digits as its factorization.

228439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400.

The product of its digits is 3456, while the sum is 28.

The square root of 228439 is about 477.9529265524. The cubic root of 228439 is about 61.1303313893.

It can be divided in two parts, 2 and 28439, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 228439 in words is "two hundred twenty-eight thousand, four hundred thirty-nine".