9238138730640 has 400 divisors, whose sum is σ = 33624262159488. Its totient is φ = 2346272704512.

The previous prime is 9238138730609. The next prime is 9238138730687. The reversal of 9238138730640 is 460378318329.

9238138730640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 34593307 + ... + 34859333.

Almost surely, 2^{9238138730640} is an apocalyptic number.

9238138730640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9238138730640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16812131079744).

9238138730640 is an abundant number, since it is smaller than the sum of its proper divisors (24386123428848).

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

9238138730640 is a wasteful number, since it uses less digits than its factorization.

9238138730640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266308 (or 266293 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 9238138730640 in words is "nine trillion, two hundred thirty-eight billion, one hundred thirty-eight million, seven hundred thirty thousand, six hundred forty".