1318367985 has 32 divisors (see below), whose sum is σ = 2380510080. Its totient is φ = 617164800.

The previous prime is 1318367983. The next prime is 1318367987. The reversal of 1318367985 is 5897638131.

1318367985 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1318367983) and next prime (1318367987).

It is not a de Polignac number, because 1318367985 - 2¹ = 1318367983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1318367983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132976 + ... + 142545.

It is an arithmetic number, because the mean of its divisors is an integer number (74390940).

Almost surely, 2^1318367985 is an apocalyptic number.

1318367985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1318367985 is a deficient number, since it is larger than the sum of its proper divisors (1062142095).

1318367985 is a wasteful number, since it uses less digits than its factorization.

1318367985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275569.

The product of its digits is 1088640, while the sum is 51.

The square root of 1318367985 is about 36309.3374354311. The cubic root of 1318367985 is about 1096.5090388628.

The spelling of 1318367985 in words is "one billion, three hundred eighteen million, three hundred sixty-seven thousand, nine hundred eighty-five".