228530 has 8 divisors (see below), whose sum is σ = 411372. Its totient is φ = 91408.

The previous prime is 228523. The next prime is 228539. The reversal of 228530 is 35822.

228530 = 275² + 276² + 277².

It can be written as a sum of positive squares in 2 ways, for example, as 214369 + 14161 = 463^2 + 119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (228539) 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, 11417 + ... + 11436.

2²²⁸⁵³⁰ is an apocalyptic number.

228530 is a deficient number, since it is larger than the sum of its proper divisors (182842).

228530 is a wasteful number, since it uses less digits than its factorization.

228530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22860.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 228530 is about 478.0481147332. The cubic root of 228530 is about 61.1384475190.

The spelling of 228530 in words is "two hundred twenty-eight thousand, five hundred thirty".