228081311728 has 40 divisors (see below), whose sum is σ = 450314222688. Its totient is φ = 111871848192.

The previous prime is 228081311707. The next prime is 228081311747. The reversal of 228081311728 is 827113180822.

It is a super-2 number, since 2×228081311728² (a number of 24 digits) contains 22 as substring.

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, 6909150 + ... + 6942082.

Almost surely, 2^228081311728 is an apocalyptic number.

It is an amenable number.

228081311728 is a deficient number, since it is larger than the sum of its proper divisors (222232910960).

228081311728 is a wasteful number, since it uses less digits than its factorization.

228081311728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41161 (or 41155 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The spelling of 228081311728 in words is "two hundred twenty-eight billion, eighty-one million, three hundred eleven thousand, seven hundred twenty-eight".