288505 has 8 divisors (see below), whose sum is σ = 395712. Its totient is φ = 197808.

The previous prime is 288499. The next prime is 288527. The reversal of 288505 is 505882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 288505 - 2¹¹ = 286457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4087 + ... + 4156.

It is an arithmetic number, because the mean of its divisors is an integer number (49464).

2²⁸⁸⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

288505 is a deficient number, since it is larger than the sum of its proper divisors (107207).

288505 is an equidigital number, since it uses as much as digits as its factorization.

288505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8255.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 288505 is about 537.1266144961. The cubic root of 288505 is about 66.0771213572.

The spelling of 288505 in words is "two hundred eighty-eight thousand, five hundred five".