228811 has 12 divisors (see below), whose sum is σ = 263872. Its totient is φ = 198000.

The previous prime is 228799. The next prime is 228829. The reversal of 228811 is 118822.

It is not a de Polignac number, because 228811 - 2⁹ = 228299 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (228841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3721 + ... + 3781.

2²²⁸⁸¹¹ is an apocalyptic number.

228811 is a deficient number, since it is larger than the sum of its proper divisors (35061).

228811 is a wasteful number, since it uses less digits than its factorization.

228811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 103 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 228811 is about 478.3419279135. The cubic root of 228811 is about 61.1634958235.

The spelling of 228811 in words is "two hundred twenty-eight thousand, eight hundred eleven".