138240858288 has 80 divisors (see below), whose sum is σ = 386718297056. Its totient is φ = 42300610560.

The previous prime is 138240858271. The next prime is 138240858289. The reversal of 138240858288 is 882858042831.

It is a happy number.

It is a super-2 number, since 2×138240858288² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138240858289) 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, 499045 + ... + 724932.

Almost surely, 2^138240858288 is an apocalyptic number.

It is an amenable number.

138240858288 is an abundant number, since it is smaller than the sum of its proper divisors (248477438768).

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

138240858288 is a wasteful number, since it uses less digits than its factorization.

138240858288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224182 (or 1224176 counting only the distinct ones).

The product of its (nonzero) digits is 7864320, while the sum is 57.

The spelling of 138240858288 in words is "one hundred thirty-eight billion, two hundred forty million, eight hundred fifty-eight thousand, two hundred eighty-eight".