138448487 has 8 divisors (see below), whose sum is σ = 142406976. Its totient is φ = 134501472.

The previous prime is 138448481. The next prime is 138448507. The reversal of 138448487 is 784844831.

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 138448487 - 2⁶ = 138448423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138448481) 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, 25538 + ... + 30480.

It is an arithmetic number, because the mean of its divisors is an integer number (17800872).

Almost surely, 2^138448487 is an apocalyptic number.

138448487 is a deficient number, since it is larger than the sum of its proper divisors (3958489).

138448487 is an equidigital number, since it uses as much as digits as its factorization.

138448487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5737.

The product of its digits is 688128, while the sum is 47.

The square root of 138448487 is about 11766.4135147461. The cubic root of 138448487 is about 517.3241323251.

The spelling of 138448487 in words is "one hundred thirty-eight million, four hundred forty-eight thousand, four hundred eighty-seven".