228304 has 20 divisors (see below), whose sum is σ = 466240. Its totient is φ = 108000.

The previous prime is 228301. The next prime is 228307. The reversal of 228304 is 403822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (228301) and next prime (228307).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228301) 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, 72 + ... + 679.

It is an arithmetic number, because the mean of its divisors is an integer number (23312).

2²²⁸³⁰⁴ is an apocalyptic number.

It is an amenable number.

228304 is an abundant number, since it is smaller than the sum of its proper divisors (237936).

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

228304 is a wasteful number, since it uses less digits than its factorization.

228304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 228304 is about 477.8116783839. The cubic root of 228304 is about 61.1182870055.

The spelling of 228304 in words is "two hundred twenty-eight thousand, three hundred four".