138307434 has 8 divisors (see below), whose sum is σ = 276614880. Its totient is φ = 46102476.

The previous prime is 138307397. The next prime is 138307439. The reversal of 138307434 is 434703831.

It is a sphenic number, since it is the product of 3 distinct primes.

138307434 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138307395 and 138307404.

It is not an unprimeable number, because it can be changed into a prime (138307439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11525614 + ... + 11525625.

It is an arithmetic number, because the mean of its divisors is an integer number (34576860).

Almost surely, 2^138307434 is an apocalyptic number.

138307434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138307434 is a wasteful number, since it uses less digits than its factorization.

138307434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23051244.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 138307434 is about 11760.4181048124. The cubic root of 138307434 is about 517.1483872582.

The spelling of 138307434 in words is "one hundred thirty-eight million, three hundred seven thousand, four hundred thirty-four".