38128539140 has 24 divisors (see below), whose sum is σ = 80532771480. Its totient is φ = 15163255808.

The previous prime is 38128539077. The next prime is 38128539149. The reversal of 38128539140 is 4193582183.

It can be written as a sum of positive squares in 4 ways, for example, as 4337276164 + 33791262976 = 65858^2 + 183824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38128539091 and 38128539100.

It is not an unprimeable number, because it can be changed into a prime (38128539149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5506445 + ... + 5513364.

It is an arithmetic number, because the mean of its divisors is an integer number (3355532145).

Almost surely, 2^38128539140 is an apocalyptic number.

It is an amenable number.

38128539140 is an abundant number, since it is smaller than the sum of its proper divisors (42404232340).

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

38128539140 is a wasteful number, since it uses less digits than its factorization.

38128539140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11019991 (or 11019989 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 38128539140 in words is "thirty-eight billion, one hundred twenty-eight million, five hundred thirty-nine thousand, one hundred forty".