138611744 has 48 divisors (see below), whose sum is σ = 293334048. Its totient is φ = 64238592.

The previous prime is 138611729. The next prime is 138611771. The reversal of 138611744 is 447116831.

It is a happy number.

It is an unprimeable number.

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, 34547 + ... + 38349.

It is an arithmetic number, because the mean of its divisors is an integer number (6111126).

Almost surely, 2^138611744 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 138611744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146667024).

138611744 is an abundant number, since it is smaller than the sum of its proper divisors (154722304).

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

138611744 is a wasteful number, since it uses less digits than its factorization.

138611744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3897 (or 3889 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 138611744 is about 11773.3488863619. The cubic root of 138611744 is about 517.5273935105.

The spelling of 138611744 in words is "one hundred thirty-eight million, six hundred eleven thousand, seven hundred forty-four".