138340028136 has 64 divisors (see below), whose sum is σ = 361067817600. Its totient is φ = 44086318848.

The previous prime is 138340028089. The next prime is 138340028153. The reversal of 138340028136 is 631820043831.

It is a junction number, because it is equal to n+sod(n) for n = 138340028094 and 138340028103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1058250 + ... + 1181766.

It is an arithmetic number, because the mean of its divisors is an integer number (5641684650).

Almost surely, 2^138340028136 is an apocalyptic number.

It is an amenable number.

138340028136 is an abundant number, since it is smaller than the sum of its proper divisors (222727789464).

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

138340028136 is a wasteful number, since it uses less digits than its factorization.

138340028136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125578 (or 125574 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 138340028136 in words is "one hundred thirty-eight billion, three hundred forty million, twenty-eight thousand, one hundred thirty-six".