138089648 has 20 divisors (see below), whose sum is σ = 276775440. Its totient is φ = 66663744.

The previous prime is 138089639. The next prime is 138089719. The reversal of 138089648 is 846980831.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 148340 + ... + 149267.

It is an arithmetic number, because the mean of its divisors is an integer number (13838772).

Almost surely, 2^138089648 is an apocalyptic number.

It is an amenable number.

138089648 is an abundant number, since it is smaller than the sum of its proper divisors (138685792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138089648 is a wasteful number, since it uses less digits than its factorization.

138089648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297644 (or 297638 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 138089648 is about 11751.1551772581. The cubic root of 138089648 is about 516.8768018401.

The spelling of 138089648 in words is "one hundred thirty-eight million, eighty-nine thousand, six hundred forty-eight".