288205285 has 4 divisors (see below), whose sum is σ = 345846348. Its totient is φ = 230564224.

The previous prime is 288205283. The next prime is 288205289. The reversal of 288205285 is 582502882.

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 48358116 + 239847169 = 6954^2 + 15487^2 .

It is a cyclic number.

It is not a de Polignac number, because 288205285 - 2¹ = 288205283 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288205283) 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, 28820524 + ... + 28820533.

It is an arithmetic number, because the mean of its divisors is an integer number (86461587).

Almost surely, 2^288205285 is an apocalyptic number.

It is an amenable number.

288205285 is a deficient number, since it is larger than the sum of its proper divisors (57641063).

288205285 is an equidigital number, since it uses as much as digits as its factorization.

288205285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57641062.

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 288205285 is about 16976.6099383829. The cubic root of 288205285 is about 660.5423190257.

The spelling of 288205285 in words is "two hundred eighty-eight million, two hundred five thousand, two hundred eighty-five".