228118821481188 has 768 divisors, whose sum is σ = 686017193702400. Its totient is φ = 64916805058560.

The previous prime is 228118821481157. The next prime is 228118821481193. The reversal of 228118821481188 is 881184128811822.

228118821481188 is a `hidden beast` number, since 2 + 2 + 8 + 118 + 8 + 21 + 481 + 18 + 8 = 666.

228118821481188 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

228118821481188 is an astonishing number since 228118821481188 = 2281188 + ... + 21481188.

It is a super-2 number, since 2×228118821481188² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 54095046856 + ... + 54095051072.

It is an arithmetic number, because the mean of its divisors is an integer number (893251554300).

Almost surely, 2^{228118821481188} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228118821481188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343008596851200).

228118821481188 is an abundant number, since it is smaller than the sum of its proper divisors (457898372221212).

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

228118821481188 is a wasteful number, since it uses less digits than its factorization.

228118821481188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637 (or 4629 counting only the distinct ones).

The product of its digits is 8388608, while the sum is 63.

The spelling of 228118821481188 in words is "two hundred twenty-eight trillion, one hundred eighteen billion, eight hundred twenty-one million, four hundred eighty-one thousand, one hundred eighty-eight".