288066865 has 4 divisors (see below), whose sum is σ = 345680244. Its totient is φ = 230453488.

The previous prime is 288066841. The next prime is 288066871. The reversal of 288066865 is 568660882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568660882 = 2 ⋅284330441.

It can be written as a sum of positive squares in 2 ways, for example, as 122146704 + 165920161 = 11052^2 + 12881^2 .

It is a cyclic number.

It is not a de Polignac number, because 288066865 - 2²¹ = 285969713 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28806682 + ... + 28806691.

It is an arithmetic number, because the mean of its divisors is an integer number (86420061).

Almost surely, 2^288066865 is an apocalyptic number.

It is an amenable number.

288066865 is a deficient number, since it is larger than the sum of its proper divisors (57613379).

288066865 is an equidigital number, since it uses as much as digits as its factorization.

288066865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57613378.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The square root of 288066865 is about 16972.5326631001. The cubic root of 288066865 is about 660.4365530848.

The spelling of 288066865 in words is "two hundred eighty-eight million, sixty-six thousand, eight hundred sixty-five".