228908901218 has 16 divisors (see below), whose sum is σ = 349009013184. Its totient is φ = 112572743760.

The previous prime is 228908901209. The next prime is 228908901241. The reversal of 228908901218 is 812109809822.

It is a happy number.

It is a Curzon 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, 3961571 + ... + 4018937.

It is an arithmetic number, because the mean of its divisors is an integer number (21813063324).

Almost surely, 2^228908901218 is an apocalyptic number.

228908901218 is a deficient number, since it is larger than the sum of its proper divisors (120100111966).

228908901218 is a wasteful number, since it uses less digits than its factorization.

228908901218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90137.

The product of its (nonzero) digits is 331776, while the sum is 50.

The spelling of 228908901218 in words is "two hundred twenty-eight billion, nine hundred eight million, nine hundred one thousand, two hundred eighteen".