138606448 has 40 divisors (see below), whose sum is σ = 277214400. Its totient is φ = 67102464.

The previous prime is 138606437. The next prime is 138606449. The reversal of 138606448 is 844606831.

It is a self number, because there is not a number n which added to its sum of digits gives 138606448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138606449) 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, 65958 + ... + 68026.

It is an arithmetic number, because the mean of its divisors is an integer number (6930360).

Almost surely, 2^138606448 is an apocalyptic number.

It is an amenable number.

138606448 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

138606448 is a wasteful number, since it uses less digits than its factorization.

138606448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209 (or 2203 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 138606448 is about 11773.1239694484. The cubic root of 138606448 is about 517.5208022942.

The spelling of 138606448 in words is "one hundred thirty-eight million, six hundred six thousand, four hundred forty-eight".