138672441 has 12 divisors (see below), whose sum is σ = 200406960. Its totient is φ = 92401080.

The previous prime is 138672439. The next prime is 138672473. The reversal of 138672441 is 144276831.

138672441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138672441 - 2¹ = 138672439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138672396 and 138672405.

It is not an unprimeable number, because it can be changed into a prime (138672491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30826 + ... + 35036.

It is an arithmetic number, because the mean of its divisors is an integer number (16700580).

Almost surely, 2^138672441 is an apocalyptic number.

It is an amenable number.

138672441 is a deficient number, since it is larger than the sum of its proper divisors (61734519).

138672441 is a wasteful number, since it uses less digits than its factorization.

138672441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876 (or 7873 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 138672441 is about 11775.9263329897. The cubic root of 138672441 is about 517.6029228881.

The spelling of 138672441 in words is "one hundred thirty-eight million, six hundred seventy-two thousand, four hundred forty-one".