138080449 has 8 divisors (see below), whose sum is σ = 150740072. Its totient is φ = 125712000.

The previous prime is 138080441. The next prime is 138080483. The reversal of 138080449 is 944080831.

It can be written as a sum of positive squares in 4 ways, for example, as 23590449 + 114490000 = 4857^2 + 10700^2 .

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 138080449 - 2³ = 138080441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138080441) 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, 71802 + ... + 73699.

It is an arithmetic number, because the mean of its divisors is an integer number (18842509).

Almost surely, 2^138080449 is an apocalyptic number.

It is an amenable number.

138080449 is a deficient number, since it is larger than the sum of its proper divisors (12659623).

138080449 is a wasteful number, since it uses less digits than its factorization.

138080449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145587.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 138080449 is about 11750.7637624114. The cubic root of 138080449 is about 516.8653241386.

The spelling of 138080449 in words is "one hundred thirty-eight million, eighty thousand, four hundred forty-nine".