338743999818 has 48 divisors (see below), whose sum is σ = 846633902400. Its totient is φ = 95879472768.

The previous prime is 338743999817. The next prime is 338743999859. The reversal of 338743999818 is 818999347833.

338743999818 is a `hidden beast` number, since 33 + 87 + 439 + 9 + 9 + 81 + 8 = 666.

It is a super-2 number, since 2×338743999818² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (338743999813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12549343 + ... + 12576306.

It is an arithmetic number, because the mean of its divisors is an integer number (17638206300).

Almost surely, 2^338743999818 is an apocalyptic number.

338743999818 is an abundant number, since it is smaller than the sum of its proper divisors (507889902582).

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

338743999818 is a wasteful number, since it uses less digits than its factorization.

338743999818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25125771 (or 25125768 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 72.

The spelling of 338743999818 in words is "three hundred thirty-eight billion, seven hundred forty-three million, nine hundred ninety-nine thousand, eight hundred eighteen".