228979 has 4 divisors (see below), whose sum is σ = 232920. Its totient is φ = 225040.

The previous prime is 228961. The next prime is 228983. The reversal of 228979 is 979822.

228979 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979822 = 2 ⋅489911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228979 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228929) 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 3 ways as a sum of consecutive naturals, for example, 1882 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (58230).

2²²⁸⁹⁷⁹ is an apocalyptic number.

228979 is a deficient number, since it is larger than the sum of its proper divisors (3941).

228979 is an equidigital number, since it uses as much as digits as its factorization.

228979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940.

The product of its digits is 18144, while the sum is 37.

The square root of 228979 is about 478.5175022922. The cubic root of 228979 is about 61.1784615281.

The spelling of 228979 in words is "two hundred twenty-eight thousand, nine hundred seventy-nine".