338611686440 has 16 divisors (see below), whose sum is σ = 761876294580. Its totient is φ = 135444674560.

The previous prime is 338611686407. The next prime is 338611686443. The reversal of 338611686440 is 44686116833.

It can be written as a sum of positive squares in 2 ways, for example, as 336587946244 + 2023740196 = 580162^2 + 44986^2 .

It is a super-2 number, since 2×338611686440² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (338611686443) 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, 4232646041 + ... + 4232646120.

Almost surely, 2^338611686440 is an apocalyptic number.

It is an amenable number.

338611686440 is an abundant number, since it is smaller than the sum of its proper divisors (423264608140).

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

338611686440 is a wasteful number, since it uses less digits than its factorization.

338611686440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8465292172 (or 8465292168 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 338611686440 in words is "three hundred thirty-eight billion, six hundred eleven million, six hundred eighty-six thousand, four hundred forty".