228666 has 16 divisors (see below), whose sum is σ = 477504. Its totient is φ = 72864.

The previous prime is 228647. The next prime is 228677. The reversal of 228666 is 666822.

228666 is a modest number, since divided by 666 gives 228 as remainder.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

228666 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 7 ways as a sum of consecutive naturals, for example, 691 + ... + 966.

It is an arithmetic number, because the mean of its divisors is an integer number (29844).

2²²⁸⁶⁶⁶ is an apocalyptic number.

228666 is an abundant number, since it is smaller than the sum of its proper divisors (248838).

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

228666 is a wasteful number, since it uses less digits than its factorization.

228666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685.

The product of its digits is 6912, while the sum is 30.

The square root of 228666 is about 478.1903386728. The cubic root of 228666 is about 61.1505731042.

The spelling of 228666 in words is "two hundred twenty-eight thousand, six hundred sixty-six".