38388306333640 has 64 divisors (see below), whose sum is σ = 89353437822000. Its totient is φ = 14825605401600.

The previous prime is 38388306333593. The next prime is 38388306333647. The reversal of 38388306333640 is 4633360388383.

It can be written as a sum of positive squares in 8 ways, for example, as 10581267328996 + 27807039004644 = 3252886^2 + 5273238^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (38388306333647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91315446 + ... + 91734874.

Almost surely, 2^{38388306333640} is an apocalyptic number.

It is an amenable number.

38388306333640 is an abundant number, since it is smaller than the sum of its proper divisors (50965131488360).

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

38388306333640 is a wasteful number, since it uses less digits than its factorization.

38388306333640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498370 (or 498366 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 58.

The spelling of 38388306333640 in words is "thirty-eight trillion, three hundred eighty-eight billion, three hundred six million, three hundred thirty-three thousand, six hundred forty".