228306 has 16 divisors (see below), whose sum is σ = 491904. Its totient is φ = 70224.

The previous prime is 228301. The next prime is 228307. The reversal of 228306 is 603822.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228301) by changing a digit.

228306 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (30744).

2²²⁸³⁰⁶ is an apocalyptic number.

228306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

228306 is an abundant number, since it is smaller than the sum of its proper divisors (263598).

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

228306 is a wasteful number, since it uses less digits than its factorization.

228306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 228306 is about 477.8137712540. The cubic root of 228306 is about 61.1184654755.

The spelling of 228306 in words is "two hundred twenty-eight thousand, three hundred six".