228668089 has 4 divisors (see below), whose sum is σ = 246257956. Its totient is φ = 211078224.

The previous prime is 228668053. The next prime is 228668131. The reversal of 228668089 is 980866822.

228668089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38007225 + 190660864 = 6165^2 + 13808^2 .

It is a cyclic number.

It is not a de Polignac number, because 228668089 - 2⁷ = 228667961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228668009) 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, 8794914 + ... + 8794939.

It is an arithmetic number, because the mean of its divisors is an integer number (61564489).

Almost surely, 2^228668089 is an apocalyptic number.

It is an amenable number.

228668089 is a deficient number, since it is larger than the sum of its proper divisors (17589867).

228668089 is a wasteful number, since it uses less digits than its factorization.

228668089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17589866.

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 228668089 is about 15121.7753256686. The cubic root of 228668089 is about 611.5075931930.

The spelling of 228668089 in words is "two hundred twenty-eight million, six hundred sixty-eight thousand, eighty-nine".