9838138139040 has 384 divisors, whose sum is σ = 34074850037760. Its totient is φ = 2374894190592.

The previous prime is 9838138139029. The next prime is 9838138139051. The reversal of 9838138139040 is 409318318389.

It is an interprime number because it is at equal distance from previous prime (9838138139029) and next prime (9838138139051).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 206170224 + ... + 206217936.

It is an arithmetic number, because the mean of its divisors is an integer number (88736588640).

Almost surely, 2^{9838138139040} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9838138139040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17037425018880).

9838138139040 is an abundant number, since it is smaller than the sum of its proper divisors (24236711898720).

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

9838138139040 is a wasteful number, since it uses less digits than its factorization.

9838138139040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48756 (or 48748 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 9838138139040 in words is "nine trillion, eight hundred thirty-eight billion, one hundred thirty-eight million, one hundred thirty-nine thousand, forty".