228723818 has 4 divisors (see below), whose sum is σ = 343085730. Its totient is φ = 114361908.

The previous prime is 228723787. The next prime is 228723821. The reversal of 228723818 is 818327822.

It is a happy number.

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., 126855169 + 101868649 = 11263^2 + 10093^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57180953 + ... + 57180956.

Almost surely, 2^228723818 is an apocalyptic number.

228723818 is a deficient number, since it is larger than the sum of its proper divisors (114361912).

228723818 is a wasteful number, since it uses less digits than its factorization.

228723818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114361911.

The product of its digits is 86016, while the sum is 41.

The square root of 228723818 is about 15123.6178872649. The cubic root of 228723818 is about 611.5572662639.

The spelling of 228723818 in words is "two hundred twenty-eight million, seven hundred twenty-three thousand, eight hundred eighteen".