289645028 has 24 divisors (see below), whose sum is σ = 537379584. Its totient is φ = 136360800.

The previous prime is 289645021. The next prime is 289645039. The reversal of 289645028 is 820546982.

289645028 is nontrivially palindromic in base 7.

289645028 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 289645028.

It is not an unprimeable number, because it can be changed into a prime (289645021) 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, 26978 + ... + 36153.

It is an arithmetic number, because the mean of its divisors is an integer number (22390816).

Almost surely, 2^289645028 is an apocalyptic number.

It is an amenable number.

289645028 is a deficient number, since it is larger than the sum of its proper divisors (247734556).

289645028 is a wasteful number, since it uses less digits than its factorization.

289645028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63203 (or 63201 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 289645028 is about 17018.9608378420. The cubic root of 289645028 is about 661.6404158834.

The spelling of 289645028 in words is "two hundred eighty-nine million, six hundred forty-five thousand, twenty-eight".