228558 has 16 divisors (see below), whose sum is σ = 498816. Its totient is φ = 69240.

The previous prime is 228539. The next prime is 228559. The reversal of 228558 is 855822.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228559) 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, 1666 + ... + 1797.

It is an arithmetic number, because the mean of its divisors is an integer number (31176).

2²²⁸⁵⁵⁸ is an apocalyptic number.

228558 is an abundant number, since it is smaller than the sum of its proper divisors (270258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228558 is a wasteful number, since it uses less digits than its factorization.

228558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479.

The product of its digits is 6400, while the sum is 30.

The square root of 228558 is about 478.0773995913. The cubic root of 228558 is about 61.1409443562.

Subtracting 228558 from its reverse (855822), we obtain a square (627264 = 792²).

The spelling of 228558 in words is "two hundred twenty-eight thousand, five hundred fifty-eight".