228656 has 20 divisors (see below), whose sum is σ = 458304. Its totient is φ = 110400.

The previous prime is 228647. The next prime is 228677. The reversal of 228656 is 656822.

228656 = T₅₃ + T₅₄ + ... + T₁₁₄.

228656 is an admirable number.

It is an Ulam number.

It is an unprimeable number.

228656 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 3 ways as a sum of consecutive naturals, for example, 266 + ... + 726.

2²²⁸⁶⁵⁶ 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 228656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229152).

228656 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

228656 is a wasteful number, since it uses less digits than its factorization.

228656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 494 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 228656 is about 478.1798824710. The cubic root of 228656 is about 61.1496816809.

The spelling of 228656 in words is "two hundred twenty-eight thousand, six hundred fifty-six".