138037746 has 64 divisors (see below), whose sum is σ = 345461760. Its totient is φ = 35722560.

The previous prime is 138037733. The next prime is 138037751. The reversal of 138037746 is 647730831.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 234865 + ... + 235451.

It is an arithmetic number, because the mean of its divisors is an integer number (5397840).

Almost surely, 2^138037746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138037746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172730880).

138037746 is an abundant number, since it is smaller than the sum of its proper divisors (207424014).

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

138037746 is a wasteful number, since it uses less digits than its factorization.

138037746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 138037746 is about 11748.9465910779. The cubic root of 138037746 is about 516.8120364217.

The spelling of 138037746 in words is "one hundred thirty-eight million, thirty-seven thousand, seven hundred forty-six".