228365689 has 4 divisors (see below), whose sum is σ = 238294656. Its totient is φ = 218436724.

The previous prime is 228365677. The next prime is 228365701. The reversal of 228365689 is 986563822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (228365677) and next prime (228365701).

It is a cyclic number.

It is not a de Polignac number, because 228365689 - 2¹⁹ = 227841401 is a prime.

It is a super-3 number, since 3×228365689³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228365629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4964449 + ... + 4964494.

It is an arithmetic number, because the mean of its divisors is an integer number (59573664).

Almost surely, 2^228365689 is an apocalyptic number.

It is an amenable number.

228365689 is a deficient number, since it is larger than the sum of its proper divisors (9928967).

228365689 is an equidigital number, since it uses as much as digits as its factorization.

228365689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9928966.

The product of its digits is 1244160, while the sum is 49.

The square root of 228365689 is about 15111.7731917866. The cubic root of 228365689 is about 611.2379134254.

The spelling of 228365689 in words is "two hundred twenty-eight million, three hundred sixty-five thousand, six hundred eighty-nine".