228769 has 4 divisors (see below), whose sum is σ = 242244. Its totient is φ = 215296.

The previous prime is 228757. The next prime is 228773. The reversal of 228769 is 967822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214369 + 14400 = 463^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 228769 - 2⁵ = 228737 is a prime.

It is a super-2 number, since 2×228769² = 104670510722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6712 + ... + 6745.

It is an arithmetic number, because the mean of its divisors is an integer number (60561).

2²²⁸⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

228769 is a deficient number, since it is larger than the sum of its proper divisors (13475).

228769 is a wasteful number, since it uses less digits than its factorization.

228769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13474.

The product of its digits is 12096, while the sum is 34.

The square root of 228769 is about 478.2980242485. The cubic root of 228769 is about 61.1597532528.

The spelling of 228769 in words is "two hundred twenty-eight thousand, seven hundred sixty-nine".