138138714 has 48 divisors (see below), whose sum is σ = 344710080. Its totient is φ = 39162240.

The previous prime is 138138701. The next prime is 138138731. The reversal of 138138714 is 417831831.

138138714 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12322 + ... + 20690.

It is an arithmetic number, because the mean of its divisors is an integer number (7181460).

Almost surely, 2^138138714 is an apocalyptic number.

138138714 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138138714, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172355040).

138138714 is an abundant number, since it is smaller than the sum of its proper divisors (206571366).

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

138138714 is a wasteful number, since it uses less digits than its factorization.

138138714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515 (or 8512 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 138138714 is about 11753.2427014846. The cubic root of 138138714 is about 516.9380134621.

The spelling of 138138714 in words is "one hundred thirty-eight million, one hundred thirty-eight thousand, seven hundred fourteen".