7838118387 has 32 divisors (see below), whose sum is σ = 12783936000. Its totient is φ = 4706773920.

The previous prime is 7838118373. The next prime is 7838118403.

7838118387 is a `hidden beast` number, since 7 + 8 + 381 + 183 + 87 = 666.

7838118387 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7838118387 - 2⁴ = 7838118371 is a prime.

It is a super-2 number, since 2×7838118387² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7838118367) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 88687 + ... + 153432.

It is an arithmetic number, because the mean of its divisors is an integer number (399498000).

Almost surely, 2^7838118387 is an apocalyptic number.

7838118387 is a deficient number, since it is larger than the sum of its proper divisors (4945817613).

7838118387 is a wasteful number, since it uses less digits than its factorization.

7838118387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242248 (or 242242 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 7838118387 is about 88533.1485207659. The cubic root of 7838118387 is about 1986.4178368024.

The spelling of 7838118387 in words is "seven billion, eight hundred thirty-eight million, one hundred eighteen thousand, three hundred eighty-seven".