138709704 has 64 divisors (see below), whose sum is σ = 400809600. Its totient is φ = 39181824.

The previous prime is 138709691. The next prime is 138709723. The reversal of 138709704 is 407907831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10314 + ... + 19590.

It is an arithmetic number, because the mean of its divisors is an integer number (6262650).

Almost surely, 2^138709704 is an apocalyptic number.

138709704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138709704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200404800).

138709704 is an abundant number, since it is smaller than the sum of its proper divisors (262099896).

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

138709704 is a wasteful number, since it uses less digits than its factorization.

138709704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9382 (or 9378 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 138709704 is about 11777.5083952422. The cubic root of 138709704 is about 517.6492808384.

The spelling of 138709704 in words is "one hundred thirty-eight million, seven hundred nine thousand, seven hundred four".