289220928 has 28 divisors (see below), whose sum is σ = 765230880. Its totient is φ = 96406912.

The previous prime is 289220909. The next prime is 289220933. The reversal of 289220928 is 829022982.

It is a self number, because there is not a number n which added to its sum of digits gives 289220928.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752988 + ... + 753371.

Almost surely, 2^289220928 is an apocalyptic number.

It is an amenable number.

289220928 is an abundant number, since it is smaller than the sum of its proper divisors (476009952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289220928 is a wasteful number, since it uses less digits than its factorization.

289220928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506374 (or 1506364 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 289220928 is about 17006.4966409899. The cubic root of 289220928 is about 661.3173321802.

The spelling of 289220928 in words is "two hundred eighty-nine million, two hundred twenty thousand, nine hundred twenty-eight".