138548608 has 64 divisors (see below), whose sum is σ = 317016000. Its totient is φ = 59650560.

The previous prime is 138548603. The next prime is 138548611. The reversal of 138548608 is 806845831.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138548603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24163 + ... + 29341.

It is an arithmetic number, because the mean of its divisors is an integer number (4953375).

Almost surely, 2^138548608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138548608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158508000).

138548608 is an abundant number, since it is smaller than the sum of its proper divisors (178467392).

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

138548608 is a wasteful number, since it uses less digits than its factorization.

138548608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223 (or 5211 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 138548608 is about 11770.6672708050. The cubic root of 138548608 is about 517.4488057209.

The spelling of 138548608 in words is "one hundred thirty-eight million, five hundred forty-eight thousand, six hundred eight".