1228816168 has 32 divisors (see below), whose sum is σ = 2442047400. Its totient is φ = 577677312.

The previous prime is 1228816163. The next prime is 1228816177. The reversal of 1228816168 is 8616188221.

It can be written as a sum of positive squares in 4 ways, for example, as 511754884 + 717061284 = 22622^2 + 26778^2 .

It is not an unprimeable number, because it can be changed into a prime (1228816163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147868 + ... + 155956.

Almost surely, 2^1228816168 is an apocalyptic number.

It is an amenable number.

1228816168 is a deficient number, since it is larger than the sum of its proper divisors (1213231232).

1228816168 is a wasteful number, since it uses less digits than its factorization.

1228816168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9229 (or 9225 counting only the distinct ones).

The product of its digits is 73728, while the sum is 43.

The square root of 1228816168 is about 35054.4742935905. The cubic root of 1228816168 is about 1071.0974177636.

The spelling of 1228816168 in words is "one billion, two hundred twenty-eight million, eight hundred sixteen thousand, one hundred sixty-eight".