1288373883939 has 20 divisors (see below), whose sum is σ = 1986692030400. Its totient is φ = 831208955760.

The previous prime is 1288373883917. The next prime is 1288373883941. The reversal of 1288373883939 is 9393883738821.

1288373883939 is a `hidden beast` number, since 12 + 8 + 83 + 73 + 88 + 393 + 9 = 666.

It is not a de Polignac number, because 1288373883939 - 2²⁴ = 1288357106723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1288373883439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 256543464 + ... + 256548485.

It is an arithmetic number, because the mean of its divisors is an integer number (99334601520).

Almost surely, 2^{1288373883939} is an apocalyptic number.

1288373883939 is a deficient number, since it is larger than the sum of its proper divisors (698318146461).

1288373883939 is an equidigital number, since it uses as much as digits as its factorization.

1288373883939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513091992 (or 513091983 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 72.

The spelling of 1288373883939 in words is "one trillion, two hundred eighty-eight billion, three hundred seventy-three million, eight hundred eighty-three thousand, nine hundred thirty-nine".