138508274 has 8 divisors (see below), whose sum is σ = 208391088. Its totient is φ = 69044580.

The previous prime is 138508261. The next prime is 138508283. The reversal of 138508274 is 472805831.

138508274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103952 + ... + 105275.

It is an arithmetic number, because the mean of its divisors is an integer number (26048886).

Almost surely, 2^138508274 is an apocalyptic number.

138508274 is a deficient number, since it is larger than the sum of its proper divisors (69882814).

138508274 is a wasteful number, since it uses less digits than its factorization.

138508274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209560.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 138508274 is about 11768.9538192653. The cubic root of 138508274 is about 517.3985879524.

The spelling of 138508274 in words is "one hundred thirty-eight million, five hundred eight thousand, two hundred seventy-four".