289312168 has 32 divisors (see below), whose sum is σ = 549619200. Its totient is φ = 142757568.

The previous prime is 289312159. The next prime is 289312169. The reversal of 289312168 is 861213982.

It is a self number, because there is not a number n which added to its sum of digits gives 289312168.

It is not an unprimeable number, because it can be changed into a prime (289312169) 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, 394330 + ... + 395062.

It is an arithmetic number, because the mean of its divisors is an integer number (17175600).

Almost surely, 2^289312168 is an apocalyptic number.

It is an amenable number.

289312168 is a deficient number, since it is larger than the sum of its proper divisors (260307032).

289312168 is a wasteful number, since it uses less digits than its factorization.

289312168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321 (or 1317 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 289312168 is about 17009.1789337405. The cubic root of 289312168 is about 661.3868663940.

The spelling of 289312168 in words is "two hundred eighty-nine million, three hundred twelve thousand, one hundred sixty-eight".