138786289830 has 96 divisors (see below), whose sum is σ = 380395491840. Its totient is φ = 35010169920.

The previous prime is 138786289777. The next prime is 138786289843. The reversal of 138786289830 is 38982687831.

It is a super-2 number, since 2×138786289830² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1108515 + ... + 1227345.

It is an arithmetic number, because the mean of its divisors is an integer number (3962453040).

Almost surely, 2^138786289830 is an apocalyptic number.

138786289830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138786289830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190197745920).

138786289830 is an abundant number, since it is smaller than the sum of its proper divisors (241609202010).

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

138786289830 is a wasteful number, since it uses less digits than its factorization.

138786289830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119546 (or 119543 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 138786289830 in words is "one hundred thirty-eight billion, seven hundred eighty-six million, two hundred eighty-nine thousand, eight hundred thirty".