388006218847 has 4 divisors (see below), whose sum is σ = 417852851080. Its totient is φ = 358159586616.

The previous prime is 388006218811. The next prime is 388006218851. The reversal of 388006218847 is 748812600883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748812600883 = 105341 ⋅7108463.

It is a de Polignac number, because none of the positive numbers 2^k-388006218847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388006218947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14923316097 + ... + 14923316122.

It is an arithmetic number, because the mean of its divisors is an integer number (104463212770).

Almost surely, 2^388006218847 is an apocalyptic number.

388006218847 is a deficient number, since it is larger than the sum of its proper divisors (29846632233).

388006218847 is a wasteful number, since it uses less digits than its factorization.

388006218847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29846632232.

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 388006218847 in words is "three hundred eighty-eight billion, six million, two hundred eighteen thousand, eight hundred forty-seven".