1318886387 has 32 divisors (see below), whose sum is σ = 1724889600. Its totient is φ = 979216128.

The previous prime is 1318886363. The next prime is 1318886407. The reversal of 1318886387 is 7836888131.

It is a cyclic number.

It is not a de Polignac number, because 1318886387 - 2²⁰ = 1317837811 is a prime.

It is a super-2 number, since 2×1318886387² = 3478922603627827538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1318886347) 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 31 ways as a sum of consecutive naturals, for example, 181439 + ... + 188567.

It is an arithmetic number, because the mean of its divisors is an integer number (53902800).

Almost surely, 2^1318886387 is an apocalyptic number.

1318886387 is a deficient number, since it is larger than the sum of its proper divisors (406003213).

1318886387 is a wasteful number, since it uses less digits than its factorization.

1318886387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7275.

The product of its digits is 1548288, while the sum is 53.

The square root of 1318886387 is about 36316.4754209436. The cubic root of 1318886387 is about 1096.6527412777.

The spelling of 1318886387 in words is "one billion, three hundred eighteen million, eight hundred eighty-six thousand, three hundred eighty-seven".