289988845 has 8 divisors (see below), whose sum is σ = 348557976. Its totient is φ = 231610176.

The previous prime is 289988827. The next prime is 289988851. The reversal of 289988845 is 548889982.

It can be written as a sum of positive squares in 4 ways, for example, as 51008164 + 238980681 = 7142^2 + 15459^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289988845 - 2⁵ = 289988813 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 44242 + ... + 50371.

It is an arithmetic number, because the mean of its divisors is an integer number (43569747).

Almost surely, 2^289988845 is an apocalyptic number.

It is an amenable number.

289988845 is a deficient number, since it is larger than the sum of its proper divisors (58569131).

289988845 is an equidigital number, since it uses as much as digits as its factorization.

289988845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95231.

The product of its digits is 13271040, while the sum is 61.

The square root of 289988845 is about 17029.0588406993. The cubic root of 289988845 is about 661.9021077827.

The spelling of 289988845 in words is "two hundred eighty-nine million, nine hundred eighty-eight thousand, eight hundred forty-five".