289311085 has 16 divisors (see below), whose sum is σ = 405213696. Its totient is φ = 194162688.

The previous prime is 289311073. The next prime is 289311091. The reversal of 289311085 is 580113982.

It is a cyclic number.

It is not a de Polignac number, because 289311085 - 2²¹ = 287213933 is a prime.

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, 86292 + ... + 89581.

It is an arithmetic number, because the mean of its divisors is an integer number (25325856).

Almost surely, 2^289311085 is an apocalyptic number.

It is an amenable number.

289311085 is a deficient number, since it is larger than the sum of its proper divisors (115902611).

289311085 is a wasteful number, since it uses less digits than its factorization.

289311085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175932.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 289311085 is about 17009.1470979588. The cubic root of 289311085 is about 661.3860411230.

The spelling of 289311085 in words is "two hundred eighty-nine million, three hundred eleven thousand, eighty-five".