228010993218 has 54 divisors (see below), whose sum is σ = 511778414667. Its totient is φ = 73363940160.

The previous prime is 228010993201. The next prime is 228010993303. The reversal of 228010993218 is 812399010822.

It is a happy number.

228010993218 is a `hidden beast` number, since 228 + 0 + 10 + 99 + 321 + 8 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 149029197849 + 78981795369 = 386043^2 + 281037^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=337647.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 58748638 + ... + 58752518.

Almost surely, 2^228010993218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228010993218

228010993218 is an abundant number, since it is smaller than the sum of its proper divisors (283767421449).

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

228010993218 is an frugal number, since it uses more digits than its factorization.

228010993218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828 (or 3915 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 228010993218 in words is "two hundred twenty-eight billion, ten million, nine hundred ninety-three thousand, two hundred eighteen".