289281 has 8 divisors (see below), whose sum is σ = 388384. Its totient is φ = 191520.

The previous prime is 289273. The next prime is 289283. The reversal of 289281 is 182982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289281 - 2³ = 289273 is a prime.

It is a super-2 number, since 2×289281² = 167366993922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289281.

It is not an unprimeable number, because it can be changed into a prime (289283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405 + ... + 861.

It is an arithmetic number, because the mean of its divisors is an integer number (48548).

2²⁸⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

289281 is a deficient number, since it is larger than the sum of its proper divisors (99103).

289281 is a wasteful number, since it uses less digits than its factorization.

289281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its digits is 2304, while the sum is 30.

The square root of 289281 is about 537.8484916777. The cubic root of 289281 is about 66.1363114834.

The spelling of 289281 in words is "two hundred eighty-nine thousand, two hundred eighty-one".