289684626 has 64 divisors (see below), whose sum is σ = 731566080. Its totient is φ = 74280960.

The previous prime is 289684601. The next prime is 289684663. The reversal of 289684626 is 626486982.

289684626 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 32530 + ... + 40466.

It is an arithmetic number, because the mean of its divisors is an integer number (11430720).

Almost surely, 2^289684626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289684626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365783040).

289684626 is an abundant number, since it is smaller than the sum of its proper divisors (441881454).

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

289684626 is a wasteful number, since it uses less digits than its factorization.

289684626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8039.

The product of its digits is 1990656, while the sum is 51.

The square root of 289684626 is about 17020.1241476083. The cubic root of 289684626 is about 661.6705659416.

The spelling of 289684626 in words is "two hundred eighty-nine million, six hundred eighty-four thousand, six hundred twenty-six".