306228 has 36 divisors (see below), whose sum is σ = 778848. Its totient is φ = 93600.

The previous prime is 306209. The next prime is 306239. The reversal of 306228 is 822603.

It is an Ulam number.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

306228 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 11 ways as a sum of consecutive naturals, for example, 1953 + ... + 2103.

2³⁰⁶²²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 306228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389424).

306228 is an abundant number, since it is smaller than the sum of its proper divisors (472620).

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

306228 is a wasteful number, since it uses less digits than its factorization.

306228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 169 counting only the distinct ones).

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

The square root of 306228 is about 553.3787129986. The cubic root of 306228 is about 67.4033734043.

The spelling of 306228 in words is "three hundred six thousand, two hundred twenty-eight".