228386918 has 16 divisors (see below), whose sum is σ = 358823520. Its totient is φ = 108816576.

The previous prime is 228386887. The next prime is 228386953. The reversal of 228386918 is 819683822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 21602.

It is an arithmetic number, because the mean of its divisors is an integer number (22426470).

Almost surely, 2^228386918 is an apocalyptic number.

228386918 is a deficient number, since it is larger than the sum of its proper divisors (130436602).

228386918 is a wasteful number, since it uses less digits than its factorization.

228386918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18751.

The product of its digits is 331776, while the sum is 47.

The square root of 228386918 is about 15112.4755748355. The cubic root of 228386918 is about 611.2568531760.

The spelling of 228386918 in words is "two hundred twenty-eight million, three hundred eighty-six thousand, nine hundred eighteen".