289000085 has 16 divisors (see below), whose sum is σ = 400583232. Its totient is φ = 197817600.

The previous prime is 289000069. The next prime is 289000097. The reversal of 289000085 is 580000982.

It is not a de Polignac number, because 289000085 - 2⁴ = 289000069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153611 + ... + 155480.

It is an arithmetic number, because the mean of its divisors is an integer number (25036452).

Almost surely, 2^289000085 is an apocalyptic number.

It is an amenable number.

289000085 is a deficient number, since it is larger than the sum of its proper divisors (111583147).

289000085 is a wasteful number, since it uses less digits than its factorization.

289000085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309124.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 289000085 is about 17000.0024999998. The cubic root of 289000085 is about 661.1489666643.

The spelling of 289000085 in words is "two hundred eighty-nine million, eighty-five", and thus it is an aban number.