138680380 has 24 divisors (see below), whose sum is σ = 293810832. Its totient is φ = 54980352.

The previous prime is 138680369. The next prime is 138680387. The reversal of 138680380 is 83086831.

138680380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138680387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28422 + ... + 32941.

It is an arithmetic number, because the mean of its divisors is an integer number (12242118).

Almost surely, 2^138680380 is an apocalyptic number.

138680380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138680380 is an abundant number, since it is smaller than the sum of its proper divisors (155130452).

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

138680380 is a wasteful number, since it uses less digits than its factorization.

138680380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61485 (or 61483 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 138680380 is about 11776.2634141734. The cubic root of 138680380 is about 517.6128002921.

The spelling of 138680380 in words is "one hundred thirty-eight million, six hundred eighty thousand, three hundred eighty".