288889 has 4 divisors (see below), whose sum is σ = 298240. Its totient is φ = 279540.

The previous prime is 288877. The next prime is 288907. The reversal of 288889 is 988882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988882 = 2 ⋅494441.

It is a cyclic number.

It is not a de Polignac number, because 288889 - 2¹³ = 280697 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (288839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4629 + ... + 4690.

It is an arithmetic number, because the mean of its divisors is an integer number (74560).

2²⁸⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

288889 is a deficient number, since it is larger than the sum of its proper divisors (9351).

288889 is an equidigital number, since it uses as much as digits as its factorization.

288889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9350.

The product of its digits is 73728, while the sum is 43.

The square root of 288889 is about 537.4839532488. The cubic root of 288889 is about 66.1064245645.

The spelling of 288889 in words is "two hundred eighty-eight thousand, eight hundred eighty-nine".