288891 has 6 divisors (see below), whose sum is σ = 417300. Its totient is φ = 192588.

The previous prime is 288877. The next prime is 288907. The reversal of 288891 is 198882.

It is not a de Polignac number, because 288891 - 2¹⁰ = 287867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (288851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16041 + ... + 16058.

It is an arithmetic number, because the mean of its divisors is an integer number (69550).

2²⁸⁸⁸⁹¹ is an apocalyptic number.

288891 is a deficient number, since it is larger than the sum of its proper divisors (128409).

288891 is a wasteful number, since it uses less digits than its factorization.

288891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32105 (or 32102 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 288891 is about 537.4858137663. The cubic root of 288891 is about 66.1065771174.

Subtracting from 288891 its reverse (198882), we obtain a palindrome (90009).

The spelling of 288891 in words is "two hundred eighty-eight thousand, eight hundred ninety-one".