228688 has 10 divisors (see below), whose sum is σ = 443114. Its totient is φ = 114336.

The previous prime is 228677. The next prime is 228707. The reversal of 228688 is 886822.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 121104 + 107584 = 348^2 + 328^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7131 + ... + 7162.

2²²⁸⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

228688 is a deficient number, since it is larger than the sum of its proper divisors (214426).

228688 is a wasteful number, since it uses less digits than its factorization.

228688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301 (or 14295 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 228688 is about 478.2133415119. The cubic root of 228688 is about 61.1525341442.

The spelling of 228688 in words is "two hundred twenty-eight thousand, six hundred eighty-eight".