138559646 has 8 divisors (see below), whose sum is σ = 214544064. Its totient is φ = 67044960.

The previous prime is 138559643. The next prime is 138559661. The reversal of 138559646 is 646955831.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 138559646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138559643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117355 + ... + 1117478.

It is an arithmetic number, because the mean of its divisors is an integer number (26818008).

Almost surely, 2^138559646 is an apocalyptic number.

138559646 is a deficient number, since it is larger than the sum of its proper divisors (75984418).

138559646 is a wasteful number, since it uses less digits than its factorization.

138559646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234866.

The product of its digits is 777600, while the sum is 47.

The square root of 138559646 is about 11771.1361388780. The cubic root of 138559646 is about 517.4625468628.

The spelling of 138559646 in words is "one hundred thirty-eight million, five hundred fifty-nine thousand, six hundred forty-six".