228775 has 6 divisors (see below), whose sum is σ = 283712. Its totient is φ = 183000.

The previous prime is 228773. The next prime is 228793. The reversal of 228775 is 577822.

It is not a de Polignac number, because 228775 - 2¹ = 228773 is a prime.

It is a Duffinian number.

228775 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228773) 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 5 ways as a sum of consecutive naturals, for example, 4551 + ... + 4600.

2²²⁸⁷⁷⁵ is an apocalyptic number.

228775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

228775 is a deficient number, since it is larger than the sum of its proper divisors (54937).

228775 is an equidigital number, since it uses as much as digits as its factorization.

228775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161 (or 9156 counting only the distinct ones).

The product of its digits is 7840, while the sum is 31.

The square root of 228775 is about 478.3042964474. The cubic root of 228775 is about 61.1602879338.

The spelling of 228775 in words is "two hundred twenty-eight thousand, seven hundred seventy-five".