228845 has 8 divisors (see below), whose sum is σ = 282264. Its totient is φ = 177984.

The previous prime is 228841. The next prime is 228847. The reversal of 228845 is 548822.

It can be written as a sum of positive squares in 4 ways, for example, as 91204 + 137641 = 302^2 + 371^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 228845 - 2² = 228841 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (35283).

2²²⁸⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

228845 is a deficient number, since it is larger than the sum of its proper divisors (53419).

228845 is a wasteful number, since it uses less digits than its factorization.

228845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279.

The product of its digits is 5120, while the sum is 29.

The square root of 228845 is about 478.3774660245. The cubic root of 228845 is about 61.1665251882.

The spelling of 228845 in words is "two hundred twenty-eight thousand, eight hundred forty-five".