288091 has 4 divisors (see below), whose sum is σ = 290992. Its totient is φ = 285192.

The previous prime is 288089. The next prime is 288109. The reversal of 288091 is 190882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190882 = 2 ⋅95441.

It is a cyclic number.

It is not a de Polignac number, because 288091 - 2¹ = 288089 is a prime.

It is a Duffinian number.

288091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (288061) 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, 1296 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (72748).

2²⁸⁸⁰⁹¹ is an apocalyptic number.

288091 is a deficient number, since it is larger than the sum of its proper divisors (2901).

288091 is a wasteful number, since it uses less digits than its factorization.

288091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 288091 is about 536.7410921478. The cubic root of 288091 is about 66.0454996940.

The spelling of 288091 in words is "two hundred eighty-eight thousand, ninety-one".