138350381 has 8 divisors (see below), whose sum is σ = 156834720. Its totient is φ = 120986352.

The previous prime is 138350351. The next prime is 138350383. The reversal of 138350381 is 183053831.

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

It is a cyclic number.

It is not a de Polignac number, because 138350381 - 2²⁶ = 71241517 is a prime.

It is a super-2 number, since 2×138350381² = 38281655845690322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138350383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279815 + ... + 280308.

It is an arithmetic number, because the mean of its divisors is an integer number (19604340).

Almost surely, 2^138350381 is an apocalyptic number.

It is an amenable number.

138350381 is a deficient number, since it is larger than the sum of its proper divisors (18484339).

138350381 is a wasteful number, since it uses less digits than its factorization.

138350381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560155.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 138350381 is about 11762.2438760638. The cubic root of 138350381 is about 517.2019097448.

The spelling of 138350381 in words is "one hundred thirty-eight million, three hundred fifty thousand, three hundred eighty-one".