228605723818 has 4 divisors (see below), whose sum is σ = 342908585730. Its totient is φ = 114302861908.

The previous prime is 228605723813. The next prime is 228605723867. The reversal of 228605723818 is 818327506822.

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., 123346356849 + 105259366969 = 351207^2 + 324437^2 .

It is not an unprimeable number, because it can be changed into a prime (228605723813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57151430953 + ... + 57151430956.

Almost surely, 2^228605723818 is an apocalyptic number.

228605723818 is a deficient number, since it is larger than the sum of its proper divisors (114302861912).

228605723818 is a wasteful number, since it uses less digits than its factorization.

228605723818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114302861911.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 228605723818 in words is "two hundred twenty-eight billion, six hundred five million, seven hundred twenty-three thousand, eight hundred eighteen".