228869 has 2 divisors, whose sum is σ = 228870. Its totient is φ = 228868.

The previous prime is 228859. The next prime is 228881. The reversal of 228869 is 968822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172225 + 56644 = 415^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 228869 - 2⁴ = 228853 is a prime.

It is a super-2 number, since 2×228869² = 104762038322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114434 + 114435.

It is an arithmetic number, because the mean of its divisors is an integer number (114435).

2²²⁸⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

228869 is a deficient number, since it is larger than the sum of its proper divisors (1).

228869 is an equidigital number, since it uses as much as digits as its factorization.

228869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 228869 is about 478.4025501604. The cubic root of 228869 is about 61.1686633825.

The spelling of 228869 in words is "two hundred twenty-eight thousand, eight hundred sixty-nine".