1387718018 has 16 divisors (see below), whose sum is σ = 2176134336. Its totient is φ = 662452560.

The previous prime is 1387718011. The next prime is 1387718023. The reversal of 1387718018 is 8108177831.

It is a happy number.

It is a super-2 number, since 2×1387718018² = 3851522594963696648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1387718018.

It is not an unprimeable number, because it can be changed into a prime (1387718011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2996 + ... + 52767.

It is an arithmetic number, because the mean of its divisors is an integer number (136008396).

Almost surely, 2^1387718018 is an apocalyptic number.

1387718018 is a deficient number, since it is larger than the sum of its proper divisors (788416318).

1387718018 is a wasteful number, since it uses less digits than its factorization.

1387718018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56329.

The product of its (nonzero) digits is 75264, while the sum is 44.

The square root of 1387718018 is about 37252.0874314447. The cubic root of 1387718018 is about 1115.4079675035.

The spelling of 1387718018 in words is "one billion, three hundred eighty-seven million, seven hundred eighteen thousand, eighteen".