138530380 has 24 divisors (see below), whose sum is σ = 303563232. Its totient is φ = 53002752.

The previous prime is 138530377. The next prime is 138530423. The reversal of 138530380 is 83035831.

138530380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150117 + ... + 151036.

It is an arithmetic number, because the mean of its divisors is an integer number (12648468).

Almost surely, 2^138530380 is an apocalyptic number.

138530380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138530380 is an abundant number, since it is smaller than the sum of its proper divisors (165032852).

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

138530380 is a wasteful number, since it uses less digits than its factorization.

138530380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301185 (or 301183 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 138530380 is about 11769.8929476865. The cubic root of 138530380 is about 517.4261121920.

The spelling of 138530380 in words is "one hundred thirty-eight million, five hundred thirty thousand, three hundred eighty".