138708256 has 24 divisors (see below), whose sum is σ = 273837564. Its totient is φ = 69162240.

The previous prime is 138708209. The next prime is 138708263. The reversal of 138708256 is 652807831.

It can be written as a sum of positive squares in 2 ways, for example, as 131331600 + 7376656 = 11460^2 + 2716^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 6126 + ... + 17746.

Almost surely, 2^138708256 is an apocalyptic number.

138708256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138708256 is a deficient number, since it is larger than the sum of its proper divisors (135129308).

138708256 is a wasteful number, since it uses less digits than its factorization.

138708256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12004 (or 11996 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 138708256 is about 11777.4469219776. The cubic root of 138708256 is about 517.6474795735.

The spelling of 138708256 in words is "one hundred thirty-eight million, seven hundred eight thousand, two hundred fifty-six".