138782841 has 8 divisors (see below), whose sum is σ = 186456864. Its totient is φ = 91815360.

The previous prime is 138782807. The next prime is 138782843. The reversal of 138782841 is 148287831.

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

It is not a de Polignac number, because 138782841 - 2¹⁷ = 138651769 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138782793 and 138782802.

It is not an unprimeable number, because it can be changed into a prime (138782843) 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, 176176 + ... + 176961.

It is an arithmetic number, because the mean of its divisors is an integer number (23307108).

Almost surely, 2^138782841 is an apocalyptic number.

It is an amenable number.

138782841 is a deficient number, since it is larger than the sum of its proper divisors (47674023).

138782841 is a wasteful number, since it uses less digits than its factorization.

138782841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353271.

The product of its digits is 86016, while the sum is 42.

The square root of 138782841 is about 11780.6129297248. The cubic root of 138782841 is about 517.7402445857.

The spelling of 138782841 in words is "one hundred thirty-eight million, seven hundred eighty-two thousand, eight hundred forty-one".