228665 has 16 divisors (see below), whose sum is σ = 302400. Its totient is φ = 165312.

The previous prime is 228647. The next prime is 228677. The reversal of 228665 is 566822.

228665 is nontrivially palindromic in base 13.

It is a cyclic number.

It is not a de Polignac number, because 228665 - 2⁶ = 228601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a plaindrome in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 228665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2714 + ... + 2796.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2²²⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

228665 is a deficient number, since it is larger than the sum of its proper divisors (73735).

228665 is a wasteful number, since it uses less digits than its factorization.

228665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136.

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

The square root of 228665 is about 478.1892930629. The cubic root of 228665 is about 61.1504839631.

The spelling of 228665 in words is "two hundred twenty-eight thousand, six hundred sixty-five".