138047740 has 24 divisors (see below), whose sum is σ = 297736992. Its totient is φ = 53726400.

The previous prime is 138047731. The next prime is 138047753. The reversal of 138047740 is 47740831.

138047740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138047696 and 138047705.

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, 92536 + ... + 94015.

It is an arithmetic number, because the mean of its divisors is an integer number (12405708).

Almost surely, 2^138047740 is an apocalyptic number.

138047740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138047740 is an abundant number, since it is smaller than the sum of its proper divisors (159689252).

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

138047740 is a wasteful number, since it uses less digits than its factorization.

138047740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186597 (or 186595 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 138047740 is about 11749.3718981059. The cubic root of 138047740 is about 516.8245086017.

The spelling of 138047740 in words is "one hundred thirty-eight million, forty-seven thousand, seven hundred forty".