228087218 has 4 divisors (see below), whose sum is σ = 342130830. Its totient is φ = 114043608.

The previous prime is 228087173. The next prime is 228087221. The reversal of 228087218 is 812780822.

228087218 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 only one way, i.e., 222099409 + 5987809 = 14903^2 + 2447^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57021803 + ... + 57021806.

Almost surely, 2^228087218 is an apocalyptic number.

228087218 is a deficient number, since it is larger than the sum of its proper divisors (114043612).

228087218 is a wasteful number, since it uses less digits than its factorization.

228087218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114043611.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 228087218 is about 15102.5566709746. The cubic root of 228087218 is about 610.9893628563.

It can be divided in two parts, 2280 and 87218, that added together give a palindrome (89498).

The spelling of 228087218 in words is "two hundred twenty-eight million, eighty-seven thousand, two hundred eighteen".