1288630115 has 16 divisors (see below), whose sum is σ = 1555128288. Its totient is φ = 1025074176.

The previous prime is 1288630111. The next prime is 1288630127. The reversal of 1288630115 is 5110368821.

It is a cyclic number.

It is not a de Polignac number, because 1288630115 - 2² = 1288630111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288630111) 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 15 ways as a sum of consecutive naturals, for example, 985292 + ... + 986598.

It is an arithmetic number, because the mean of its divisors is an integer number (97195518).

Almost surely, 2^1288630115 is an apocalyptic number.

1288630115 is a deficient number, since it is larger than the sum of its proper divisors (266498173).

1288630115 is a wasteful number, since it uses less digits than its factorization.

1288630115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1288630115 is about 35897.4945504557. The cubic root of 1288630115 is about 1088.2017638157.

Adding to 1288630115 its reverse (5110368821), we get a palindrome (6398998936).

The spelling of 1288630115 in words is "one billion, two hundred eighty-eight million, six hundred thirty thousand, one hundred fifteen".