1288158813 has 12 divisors (see below), whose sum is σ = 1863717180. Its totient is φ = 857367936.

The previous prime is 1288158797. The next prime is 1288158853. The reversal of 1288158813 is 3188518821.

It can be written as a sum of positive squares in 2 ways, for example, as 34786404 + 1253372409 = 5898^2 + 35403^2 .

It is not a de Polignac number, because 1288158813 - 2⁴ = 1288158797 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288158853) 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 11 ways as a sum of consecutive naturals, for example, 111228 + ... + 122261.

It is an arithmetic number, because the mean of its divisors is an integer number (155309765).

Almost surely, 2^1288158813 is an apocalyptic number.

It is an amenable number.

1288158813 is a deficient number, since it is larger than the sum of its proper divisors (575558367).

1288158813 is a wasteful number, since it uses less digits than its factorization.

1288158813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234108 (or 234105 counting only the distinct ones).

The product of its digits is 122880, while the sum is 45.

The square root of 1288158813 is about 35890.9293972725. The cubic root of 1288158813 is about 1088.0690817786.

The spelling of 1288158813 in words is "one billion, two hundred eighty-eight million, one hundred fifty-eight thousand, eight hundred thirteen".