228123866 has 4 divisors (see below), whose sum is σ = 342185802. Its totient is φ = 114061932.

The previous prime is 228123859. The next prime is 228123869. The reversal of 228123866 is 668321822.

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

It can be written as a sum of positive squares in only one way, i.e., 153041641 + 75082225 = 12371^2 + 8665^2 .

It is not an unprimeable number, because it can be changed into a prime (228123869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57030965 + ... + 57030968.

Almost surely, 2^228123866 is an apocalyptic number.

228123866 is a deficient number, since it is larger than the sum of its proper divisors (114061936).

228123866 is a wasteful number, since it uses less digits than its factorization.

228123866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114061935.

The product of its digits is 55296, while the sum is 38.

The square root of 228123866 is about 15103.7699267435. The cubic root of 228123866 is about 611.0220847528.

The spelling of 228123866 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, eight hundred sixty-six".