138428318 has 16 divisors (see below), whose sum is σ = 238151040. Its totient is φ = 59115096.

The previous prime is 138428317. The next prime is 138428321. The reversal of 138428318 is 813824831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138428317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13508 + ... + 21431.

It is an arithmetic number, because the mean of its divisors is an integer number (14884440).

Almost surely, 2^138428318 is an apocalyptic number.

138428318 is a deficient number, since it is larger than the sum of its proper divisors (99722722).

138428318 is a wasteful number, since it uses less digits than its factorization.

138428318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35231.

The product of its digits is 36864, while the sum is 38.

The square root of 138428318 is about 11765.5564254310. The cubic root of 138428318 is about 517.2990100640.

The spelling of 138428318 in words is "one hundred thirty-eight million, four hundred twenty-eight thousand, three hundred eighteen".