1288081768 has 8 divisors (see below), whose sum is σ = 2415153330. Its totient is φ = 644040880.

The previous prime is 1288081759. The next prime is 1288081829. The reversal of 1288081768 is 8671808821.

It can be written as a sum of positive squares in only one way, i.e., 671950084 + 616131684 = 25922^2 + 24822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 80505103 + ... + 80505118.

Almost surely, 2^1288081768 is an apocalyptic number.

It is an amenable number.

1288081768 is a deficient number, since it is larger than the sum of its proper divisors (1127071562).

1288081768 is a wasteful number, since it uses less digits than its factorization.

1288081768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161010227 (or 161010223 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 49.

The square root of 1288081768 is about 35889.8560598953. The cubic root of 1288081768 is about 1088.0473888132.

The spelling of 1288081768 in words is "one billion, two hundred eighty-eight million, eighty-one thousand, seven hundred sixty-eight".