228813 has 8 divisors (see below), whose sum is σ = 328608. Its totient is φ = 140784.

The previous prime is 228799. The next prime is 228829. The reversal of 228813 is 318822.

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

It is not a de Polignac number, because 228813 - 2⁴ = 228797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228853) 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 7 ways as a sum of consecutive naturals, for example, 2895 + ... + 2972.

It is an arithmetic number, because the mean of its divisors is an integer number (41076).

2²²⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

228813 is a deficient number, since it is larger than the sum of its proper divisors (99795).

228813 is a wasteful number, since it uses less digits than its factorization.

228813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5883.

The product of its digits is 768, while the sum is 24.

The square root of 228813 is about 478.3440184637. The cubic root of 228813 is about 61.1636740297.

Subtracting 228813 from its reverse (318822), we obtain a palindrome (90009).

The spelling of 228813 in words is "two hundred twenty-eight thousand, eight hundred thirteen".