228569 has 6 divisors (see below), whose sum is σ = 251370. Its totient is φ = 207680.

The previous prime is 228559. The next prime is 228577. The reversal of 228569 is 965822.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 34969 = 440^2 + 187^2 .

It is not a de Polignac number, because 228569 - 2¹² = 224473 is a prime.

It is a super-2 number, since 2×228569² = 104487575522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (228509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 824 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (41895).

2²²⁸⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

228569 is a deficient number, since it is larger than the sum of its proper divisors (22801).

228569 is a wasteful number, since it uses less digits than its factorization.

228569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911 (or 1900 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 228569 is about 478.0889038662. The cubic root of 228569 is about 61.1419252007.

It can be divided in two parts, 228 and 569, that added together give a palindrome (797).

The spelling of 228569 in words is "two hundred twenty-eight thousand, five hundred sixty-nine".