289430 has 16 divisors (see below), whose sum is σ = 527904. Its totient is φ = 114240.

The previous prime is 289423. The next prime is 289439. The reversal of 289430 is 34982.

289430 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 a self number, because there is not a number n which added to its sum of digits gives 289430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289439) by changing a digit.

289430 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890 + ... + 1170.

It is an arithmetic number, because the mean of its divisors is an integer number (32994).

2²⁸⁹⁴³⁰ is an apocalyptic number.

289430 is a deficient number, since it is larger than the sum of its proper divisors (238474).

289430 is a wasteful number, since it uses less digits than its factorization.

289430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 289430 is about 537.9869886902. The cubic root of 289430 is about 66.1476644804.

The spelling of 289430 in words is "two hundred eighty-nine thousand, four hundred thirty".