138716672 has 20 divisors (see below), whose sum is σ = 277163436. Its totient is φ = 69358080.

The previous prime is 138716671. The next prime is 138716687. The reversal of 138716672 is 276617831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138716671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134954 + ... + 135977.

Almost surely, 2^138716672 is an apocalyptic number.

It is an amenable number.

138716672 is a deficient number, since it is larger than the sum of its proper divisors (138446764).

138716672 is an frugal number, since it uses more digits than its factorization.

138716672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270949 (or 270933 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 138716672 is about 11777.8042096139. The cubic root of 138716672 is about 517.6579486285.

The spelling of 138716672 in words is "one hundred thirty-eight million, seven hundred sixteen thousand, six hundred seventy-two".