288265 has 4 divisors (see below), whose sum is σ = 345924. Its totient is φ = 230608.

The previous prime is 288257. The next prime is 288283. The reversal of 288265 is 562882.

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

It can be written as a sum of positive squares in 2 ways, for example, as 166464 + 121801 = 408^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 288265 - 2³ = 288257 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2² + 8² + 2¹³ + 8² + 6⁷ + 5 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28822 + ... + 28831.

It is an arithmetic number, because the mean of its divisors is an integer number (86481).

2²⁸⁸²⁶⁵ is an apocalyptic number.

It is an amenable number.

288265 is a deficient number, since it is larger than the sum of its proper divisors (57659).

288265 is an equidigital number, since it uses as much as digits as its factorization.

288265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57658.

The product of its digits is 7680, while the sum is 31.

The square root of 288265 is about 536.9031570032. The cubic root of 288265 is about 66.0587936464.

The spelling of 288265 in words is "two hundred eighty-eight thousand, two hundred sixty-five".