288881 has 4 divisors (see below), whose sum is σ = 305892. Its totient is φ = 271872.

The previous prime is 288877. The next prime is 288907. The reversal of 288881 is 188882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188882 = 2 ⋅94441.

It can be written as a sum of positive squares in 2 ways, for example, as 128881 + 160000 = 359^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 288881 - 2² = 288877 is a prime.

It is a super-2 number, since 2×288881² = 166904464322, which contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 8480 + ... + 8513.

It is an arithmetic number, because the mean of its divisors is an integer number (76473).

2²⁸⁸⁸⁸¹ is an apocalyptic number.

It is an amenable number.

288881 is a deficient number, since it is larger than the sum of its proper divisors (17011).

288881 is a wasteful number, since it uses less digits than its factorization.

288881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17010.

The product of its digits is 8192, while the sum is 35.

The square root of 288881 is about 537.4765111147. The cubic root of 288881 is about 66.1058143460.

Subtracting from 288881 its reverse (188882), we obtain a palindrome (99999).

The spelling of 288881 in words is "two hundred eighty-eight thousand, eight hundred eighty-one".