228578637668 has 24 divisors (see below), whose sum is σ = 401787909432. Its totient is φ = 113782235904.

The previous prime is 228578637667. The next prime is 228578637673. The reversal of 228578637668 is 866736875822.

It is a happy number.

228578637668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 70475382784 + 158103254884 = 265472^2 + 397622^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228578637598 and 228578637607.

It is not an unprimeable number, because it can be changed into a prime (228578637667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8632946 + ... + 8659382.

It is an arithmetic number, because the mean of its divisors is an integer number (16741162893).

Almost surely, 2^228578637668 is an apocalyptic number.

It is an amenable number.

228578637668 is a deficient number, since it is larger than the sum of its proper divisors (173209271764).

228578637668 is a wasteful number, since it uses less digits than its factorization.

228578637668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35951 (or 35949 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 68.

The spelling of 228578637668 in words is "two hundred twenty-eight billion, five hundred seventy-eight million, six hundred thirty-seven thousand, six hundred sixty-eight".