138732736 has 28 divisors (see below), whose sum is σ = 277071328. Its totient is φ = 68919552.

The previous prime is 138732731. The next prime is 138732739. The reversal of 138732736 is 637237831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138732731) 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, 3145 + ... + 16951.

Almost surely, 2^138732736 is an apocalyptic number.

138732736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138732736 is a deficient number, since it is larger than the sum of its proper divisors (138338592).

138732736 is a wasteful number, since it uses less digits than its factorization.

138732736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13976 (or 13966 counting only the distinct ones).

The product of its digits is 127008, while the sum is 40.

The square root of 138732736 is about 11778.4861506053. The cubic root of 138732736 is about 517.6779302120.

The spelling of 138732736 in words is "one hundred thirty-eight million, seven hundred thirty-two thousand, seven hundred thirty-six".