228765 has 16 divisors (see below), whose sum is σ = 372096. Its totient is φ = 120000.

The previous prime is 228757. The next prime is 228773. The reversal of 228765 is 567822.

It is an interprime number because it is at equal distance from previous prime (228757) and next prime (228773).

It is not a de Polignac number, because 228765 - 2³ = 228757 is a prime.

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 228765.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1440 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (23256).

2²²⁸⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

228765 is a deficient number, since it is larger than the sum of its proper divisors (143331).

228765 is a wasteful number, since it uses less digits than its factorization.

228765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260.

The product of its digits is 6720, while the sum is 30.

The square root of 228765 is about 478.2938427369. The cubic root of 228765 is about 61.1593967936.

The spelling of 228765 in words is "two hundred twenty-eight thousand, seven hundred sixty-five".