289660225 has 24 divisors (see below), whose sum is σ = 379316000. Its totient is φ = 218816640.

The previous prime is 289660199. The next prime is 289660243. The reversal of 289660225 is 522066982.

It is not a de Polignac number, because 289660225 - 2⁷ = 289660097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179221 + ... + 180829.

Almost surely, 2^289660225 is an apocalyptic number.

289660225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

289660225 is a deficient number, since it is larger than the sum of its proper divisors (89655775).

289660225 is a wasteful number, since it uses less digits than its factorization.

289660225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 289660225 is about 17019.4073046038. The cubic root of 289660225 is about 661.6519872582.

The spelling of 289660225 in words is "two hundred eighty-nine million, six hundred sixty thousand, two hundred twenty-five".