138807744 has 56 divisors (see below), whose sum is σ = 370880640. Its totient is φ = 45813504.

The previous prime is 138807727. The next prime is 138807751. The reversal of 138807744 is 447708831.

It is a junction number, because it is equal to n+sod(n) for n = 138807696 and 138807705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16267 + ... + 23285.

Almost surely, 2^138807744 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 138807744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185440320).

138807744 is an abundant number, since it is smaller than the sum of its proper divisors (232072896).

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

138807744 is a wasteful number, since it uses less digits than its factorization.

138807744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137 (or 7127 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 138807744 is about 11781.6698307158. The cubic root of 138807744 is about 517.7712102635.

The spelling of 138807744 in words is "one hundred thirty-eight million, eight hundred seven thousand, seven hundred forty-four".