228828 has 12 divisors (see below), whose sum is σ = 533960. Its totient is φ = 76272.

The previous prime is 228799. The next prime is 228829. The reversal of 228828 is 828822.

228828 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 228795 and 228804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228829) by changing a digit.

228828 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9523 + ... + 9546.

2²²⁸⁸²⁸ is an apocalyptic number.

It is an amenable number.

228828 is an abundant number, since it is smaller than the sum of its proper divisors (305132).

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

228828 is a wasteful number, since it uses less digits than its factorization.

228828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19076 (or 19074 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 228828 is about 478.3596972990. The cubic root of 228828 is about 61.1650105433.

The spelling of 228828 in words is "two hundred twenty-eight thousand, eight hundred twenty-eight".