228538 has 4 divisors (see below), whose sum is σ = 342810. Its totient is φ = 114268.

The previous prime is 228523. The next prime is 228539. The reversal of 228538 is 835822.

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

It can be written as a sum of positive squares in only one way, i.e., 117649 + 110889 = 343^2 + 333^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (228539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57133 + ... + 57136.

2²²⁸⁵³⁸ is an apocalyptic number.

228538 is a deficient number, since it is larger than the sum of its proper divisors (114272).

228538 is a wasteful number, since it uses less digits than its factorization.

228538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114271.

The product of its digits is 3840, while the sum is 28.

The square root of 228538 is about 478.0564820186. The cubic root of 228538 is about 61.1391609218.

The spelling of 228538 in words is "two hundred twenty-eight thousand, five hundred thirty-eight".