228745 has 8 divisors (see below), whose sum is σ = 299520. Its totient is φ = 166320.

The previous prime is 228737. The next prime is 228751. The reversal of 228745 is 547822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228745 - 2³ = 228737 is a prime.

228745 is a lucky number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2025 + ... + 2134.

It is an arithmetic number, because the mean of its divisors is an integer number (37440).

2²²⁸⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

228745 is a deficient number, since it is larger than the sum of its proper divisors (70775).

228745 is a wasteful number, since it uses less digits than its factorization.

228745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175.

The product of its digits is 4480, while the sum is 28.

The square root of 228745 is about 478.2729346304. The cubic root of 228745 is about 61.1576144353.

It can be divided in two parts, 2287 and 45, that added together give a palindrome (2332).

The spelling of 228745 in words is "two hundred twenty-eight thousand, seven hundred forty-five".