288655 has 4 divisors (see below), whose sum is σ = 346392. Its totient is φ = 230920.

The previous prime is 288653. The next prime is 288661. The reversal of 288655 is 556882.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 288655 - 2¹ = 288653 is a prime.

It is a Duffinian number.

288655 is a lucky number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 288655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28861 + ... + 28870.

It is an arithmetic number, because the mean of its divisors is an integer number (86598).

2²⁸⁸⁶⁵⁵ is an apocalyptic number.

288655 is a deficient number, since it is larger than the sum of its proper divisors (57737).

288655 is an equidigital number, since it uses as much as digits as its factorization.

288655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57736.

The product of its digits is 19200, while the sum is 34.

The square root of 288655 is about 537.2662282333. The cubic root of 288655 is about 66.0885710154.

It can be divided in two parts, 2 and 88655, that multiplied together give a triangular number (177310 = T₅₉₅).

The spelling of 288655 in words is "two hundred eighty-eight thousand, six hundred fifty-five".