138272656 has 20 divisors (see below), whose sum is σ = 268232832. Its totient is φ = 69051296.

The previous prime is 138272653. The next prime is 138272669. The reversal of 138272656 is 656272831.

It is not an unprimeable number, because it can be changed into a prime (138272653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9321 + ... + 19063.

Almost surely, 2^138272656 is an apocalyptic number.

138272656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138272656 is a deficient number, since it is larger than the sum of its proper divisors (129960176).

138272656 is an equidigital number, since it uses as much as digits as its factorization.

138272656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10638 (or 10632 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 138272656 is about 11758.9394079568. The cubic root of 138272656 is about 517.1050372280.

The spelling of 138272656 in words is "one hundred thirty-eight million, two hundred seventy-two thousand, six hundred fifty-six".