138000544 has 48 divisors (see below), whose sum is σ = 301293216. Its totient is φ = 61689600.

The previous prime is 138000539. The next prime is 138000557. The reversal of 138000544 is 445000831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18259 + ... + 24685.

It is an arithmetic number, because the mean of its divisors is an integer number (6276942).

Almost surely, 2^138000544 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 138000544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150646608).

138000544 is an abundant number, since it is smaller than the sum of its proper divisors (163292672).

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

138000544 is a wasteful number, since it uses less digits than its factorization.

138000544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509 (or 6501 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 138000544 is about 11747.3632786255. The cubic root of 138000544 is about 516.7656042696.

The spelling of 138000544 in words is "one hundred thirty-eight million, five hundred forty-four", and thus it is an aban number.