289668285 has 64 divisors (see below), whose sum is σ = 534159360. Its totient is φ = 148841280.

The previous prime is 289668277. The next prime is 289668289. The reversal of 289668285 is 582866982.

It is not a de Polignac number, because 289668285 - 2³ = 289668277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289668289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 450174 + ... + 450816.

It is an arithmetic number, because the mean of its divisors is an integer number (8346240).

Almost surely, 2^289668285 is an apocalyptic number.

It is an amenable number.

289668285 is a deficient number, since it is larger than the sum of its proper divisors (244491075).

289668285 is a wasteful number, since it uses less digits than its factorization.

289668285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775 (or 769 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 289668285 is about 17019.6440914609. The cubic root of 289668285 is about 661.6581241790.

The spelling of 289668285 in words is "two hundred eighty-nine million, six hundred sixty-eight thousand, two hundred eighty-five".