289855 has 8 divisors (see below), whose sum is σ = 360000. Its totient is φ = 223776.

The previous prime is 289853. The next prime is 289859. The reversal of 289855 is 558982.

289855 = T₃₃₈ + T₃₃₉ + ... + T₃₄₂.

It is a happy number.

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 289855 - 2¹ = 289853 is a prime.

289855 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289853) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 855 + ... + 1144.

It is an arithmetic number, because the mean of its divisors is an integer number (45000).

2²⁸⁹⁸⁵⁵ is an apocalyptic number.

289855 is a deficient number, since it is larger than the sum of its proper divisors (70145).

289855 is a wasteful number, since it uses less digits than its factorization.

289855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033.

The product of its digits is 28800, while the sum is 37.

The square root of 289855 is about 538.3818347604. The cubic root of 289855 is about 66.1800257979.

The spelling of 289855 in words is "two hundred eighty-nine thousand, eight hundred fifty-five".