138828239530 has 16 divisors (see below), whose sum is σ = 255702246624. Its totient is φ = 54239870160.

The previous prime is 138828239513. The next prime is 138828239549. The reversal of 138828239530 is 35932828831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161427756 + ... + 161428615.

It is an arithmetic number, because the mean of its divisors is an integer number (15981390414).

Almost surely, 2^138828239530 is an apocalyptic number.

138828239530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138828239530 is a deficient number, since it is larger than the sum of its proper divisors (116874007094).

138828239530 is a wasteful number, since it uses less digits than its factorization.

138828239530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322856421.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 138828239530 in words is "one hundred thirty-eight billion, eight hundred twenty-eight million, two hundred thirty-nine thousand, five hundred thirty".