228618 has 24 divisors (see below), whose sum is σ = 533988. Its totient is φ = 70272.

The previous prime is 228617. The next prime is 228619. The reversal of 228618 is 816822.

It is an interprime number because it is at equal distance from previous prime (228617) and next prime (228619).

It can be written as a sum of positive squares in 2 ways, for example, as 227529 + 1089 = 477^2 + 33^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228591 and 228600.

It is not an unprimeable number, because it can be changed into a prime (228611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255 + ... + 722.

2²²⁸⁶¹⁸ is an apocalyptic number.

228618 is an abundant number, since it is smaller than the sum of its proper divisors (305370).

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

228618 is a wasteful number, since it uses less digits than its factorization.

228618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 995 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 228618 is about 478.1401468189. The cubic root of 228618 is about 61.1462940350.

It can be divided in two parts, 2286 and 18, that added together give a square (2304 = 48²).

The spelling of 228618 in words is "two hundred twenty-eight thousand, six hundred eighteen".