138980386 has 16 divisors (see below), whose sum is σ = 214460928. Its totient is φ = 67510800.

The previous prime is 138980381. The next prime is 138980407. The reversal of 138980386 is 683089831.

It is not an unprimeable number, because it can be changed into a prime (138980381) 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, 12196 + ... + 20656.

It is an arithmetic number, because the mean of its divisors is an integer number (13403808).

Almost surely, 2^138980386 is an apocalyptic number.

138980386 is a deficient number, since it is larger than the sum of its proper divisors (75480542).

138980386 is a wasteful number, since it uses less digits than its factorization.

138980386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8697.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 138980386 is about 11788.9942743221. The cubic root of 138980386 is about 517.9857804815.

The spelling of 138980386 in words is "one hundred thirty-eight million, nine hundred eighty thousand, three hundred eighty-six".