289809928 has 16 divisors (see below), whose sum is σ = 548473680. Its totient is φ = 143550288.

The previous prime is 289809901. The next prime is 289809929. The reversal of 289809928 is 829908982.

It is not an unprimeable number, because it can be changed into a prime (289809929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168426 + ... + 170137.

It is an arithmetic number, because the mean of its divisors is an integer number (34279605).

Almost surely, 2^289809928 is an apocalyptic number.

It is an amenable number.

289809928 is a deficient number, since it is larger than the sum of its proper divisors (258663752).

289809928 is a wasteful number, since it uses less digits than its factorization.

289809928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338676 (or 338672 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 289809928 is about 17023.8047451209. The cubic root of 289809928 is about 661.7659532315.

The spelling of 289809928 in words is "two hundred eighty-nine million, eight hundred nine thousand, nine hundred twenty-eight".