228549 has 16 divisors (see below), whose sum is σ = 328320. Its totient is φ = 141120.

The previous prime is 228539. The next prime is 228559. The reversal of 228549 is 945822.

228549 = 32² + 33² + ... + 89².

It is an interprime number because it is at equal distance from previous prime (228539) and next prime (228559).

It is not a de Polignac number, because 228549 - 2⁵ = 228517 is a prime.

It is a Curzon number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3184 + ... + 3254.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2²²⁸⁵⁴⁹ is an apocalyptic number.

228549 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

228549 is a deficient number, since it is larger than the sum of its proper divisors (99771).

228549 is a wasteful number, since it uses less digits than its factorization.

228549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140.

The product of its digits is 5760, while the sum is 30.

The square root of 228549 is about 478.0679867969. The cubic root of 228549 is about 61.1401418236.

It can be divided in two parts, 228 and 549, that added together give a palindrome (777).

The spelling of 228549 in words is "two hundred twenty-eight thousand, five hundred forty-nine".