228118812 has 12 divisors (see below), whose sum is σ = 532277256. Its totient is φ = 76039600.

The previous prime is 228118799. The next prime is 228118817. The reversal of 228118812 is 218811822.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×228118812³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228118817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9504939 + ... + 9504962.

It is an arithmetic number, because the mean of its divisors is an integer number (44356438).

Almost surely, 2^228118812 is an apocalyptic number.

It is an amenable number.

228118812 is an abundant number, since it is smaller than the sum of its proper divisors (304158444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228118812 is a wasteful number, since it uses less digits than its factorization.

228118812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19009908 (or 19009906 counting only the distinct ones).

The product of its digits is 4096, while the sum is 33.

The square root of 228118812 is about 15103.6026165945. The cubic root of 228118812 is about 611.0175723966.

The spelling of 228118812 in words is "two hundred twenty-eight million, one hundred eighteen thousand, eight hundred twelve".