228823 has 8 divisors (see below), whose sum is σ = 264992. Its totient is φ = 193536.

The previous prime is 228799. The next prime is 228829. The reversal of 228823 is 328822.

228823 = T₁₃₇ + T₁₃₈ + ... + T₁₅₇.

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

It is not a de Polignac number, because 228823 - 2⁹ = 228311 is a prime.

It is a super-3 number, since 3×228823³ = 35943493039433301, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228829) 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, 511 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (33124).

2²²⁸⁸²³ is an apocalyptic number.

228823 is a deficient number, since it is larger than the sum of its proper divisors (36169).

228823 is an equidigital number, since it uses as much as digits as its factorization.

228823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its digits is 1536, while the sum is 25.

The square root of 228823 is about 478.3544710777. The cubic root of 228823 is about 61.1645650453.

Subtracting 228823 from its reverse (328822), we obtain a palindrome (99999).

The spelling of 228823 in words is "two hundred twenty-eight thousand, eight hundred twenty-three".