288640361 has 4 divisors (see below), whose sum is σ = 288711252. Its totient is φ = 288569472.

The previous prime is 288640351. The next prime is 288640379. The reversal of 288640361 is 163046882.

It is a happy number.

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 15366400 + 273273961 = 3920^2 + 16531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288640361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288640351) by changing a digit.

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, 28940 + ... + 37613.

It is an arithmetic number, because the mean of its divisors is an integer number (72177813).

Almost surely, 2^288640361 is an apocalyptic number.

It is an amenable number.

288640361 is a deficient number, since it is larger than the sum of its proper divisors (70891).

288640361 is an equidigital number, since it uses as much as digits as its factorization.

288640361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70890.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 288640361 is about 16989.4190895392. The cubic root of 288640361 is about 660.8745377982.

The spelling of 288640361 in words is "two hundred eighty-eight million, six hundred forty thousand, three hundred sixty-one".