138008446 has 8 divisors (see below), whose sum is σ = 212607720. Its totient is φ = 67139208.

The previous prime is 138008443. The next prime is 138008459. The reversal of 138008446 is 644800831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138008443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932416 + ... + 932563.

It is an arithmetic number, because the mean of its divisors is an integer number (26575965).

Almost surely, 2^138008446 is an apocalyptic number.

138008446 is a deficient number, since it is larger than the sum of its proper divisors (74599274).

138008446 is a wasteful number, since it uses less digits than its factorization.

138008446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865018.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 138008446 is about 11747.6996046034. The cubic root of 138008446 is about 516.7754675251.

The spelling of 138008446 in words is "one hundred thirty-eight million, eight thousand, four hundred forty-six".