289020728 has 16 divisors (see below), whose sum is σ = 560601000. Its totient is φ = 139527136.

The previous prime is 289020707. The next prime is 289020733. The reversal of 289020728 is 827020982.

It is a junction number, because it is equal to n+sod(n) for n = 289020691 and 289020700.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 622658 + ... + 623121.

Almost surely, 2^289020728 is an apocalyptic number.

It is an amenable number.

289020728 is a deficient number, since it is larger than the sum of its proper divisors (271580272).

289020728 is a wasteful number, since it uses less digits than its factorization.

289020728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245814 (or 1245810 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 289020728 is about 17000.6096361278. The cubic root of 289020728 is about 661.1647080359.

The spelling of 289020728 in words is "two hundred eighty-nine million, twenty thousand, seven hundred twenty-eight".