138171586 has 8 divisors (see below), whose sum is σ = 236865600. Its totient is φ = 59216388.

The previous prime is 138171571. The next prime is 138171589. The reversal of 138171586 is 685171831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138171589) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4934686 + ... + 4934713.

It is an arithmetic number, because the mean of its divisors is an integer number (29608200).

Almost surely, 2^138171586 is an apocalyptic number.

138171586 is a deficient number, since it is larger than the sum of its proper divisors (98694014).

138171586 is an equidigital number, since it uses as much as digits as its factorization.

138171586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9869408.

The product of its digits is 40320, while the sum is 40.

The square root of 138171586 is about 11754.6410408825. The cubic root of 138171586 is about 516.9790143714.

The spelling of 138171586 in words is "one hundred thirty-eight million, one hundred seventy-one thousand, five hundred eighty-six".