1318885866 has 12 divisors (see below), whose sum is σ = 2857586082. Its totient is φ = 439628616.

The previous prime is 1318885859. The next prime is 1318885871. The reversal of 1318885866 is 6685888131.

It can be written as a sum of positive squares in only one way, i.e., 1209578841 + 109307025 = 34779^2 + 10455^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36635701 + ... + 36635736.

Almost surely, 2^1318885866 is an apocalyptic number.

1318885866 is an abundant number, since it is smaller than the sum of its proper divisors (1538700216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1318885866 is a wasteful number, since it uses less digits than its factorization.

1318885866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73271445 (or 73271442 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 1318885866 is about 36316.4682478900. The cubic root of 1318885866 is about 1096.6525968740.

The spelling of 1318885866 in words is "one billion, three hundred eighteen million, eight hundred eighty-five thousand, eight hundred sixty-six".