138559398 has 32 divisors (see below), whose sum is σ = 286820352. Its totient is φ = 44577600.

The previous prime is 138559391. The next prime is 138559403. The reversal of 138559398 is 893955831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138559398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138559391) 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 15 ways as a sum of consecutive naturals, for example, 92818 + ... + 94298.

It is an arithmetic number, because the mean of its divisors is an integer number (8963136).

Almost surely, 2^138559398 is an apocalyptic number.

138559398 is an abundant number, since it is smaller than the sum of its proper divisors (148260954).

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

138559398 is a wasteful number, since it uses less digits than its factorization.

138559398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020.

The product of its digits is 1166400, while the sum is 51.

The square root of 138559398 is about 11771.1256046310. The cubic root of 138559398 is about 517.4622381370.

The spelling of 138559398 in words is "one hundred thirty-eight million, five hundred fifty-nine thousand, three hundred ninety-eight".