138205441 has 8 divisors (see below), whose sum is σ = 152105184. Its totient is φ = 124528320.

The previous prime is 138205433. The next prime is 138205451. The reversal of 138205441 is 144502831.

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 138205441 - 2³ = 138205433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138205421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54351 + ... + 56836.

It is an arithmetic number, because the mean of its divisors is an integer number (19013148).

Almost surely, 2^138205441 is an apocalyptic number.

138205441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138205441 is a deficient number, since it is larger than the sum of its proper divisors (13899743).

138205441 is a wasteful number, since it uses less digits than its factorization.

138205441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111311.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 138205441 is about 11756.0810221774. The cubic root of 138205441 is about 517.0212345696.

The spelling of 138205441 in words is "one hundred thirty-eight million, two hundred five thousand, four hundred forty-one".