138930536 has 8 divisors (see below), whose sum is σ = 260494770. Its totient is φ = 69465264.

The previous prime is 138930529. The next prime is 138930541. The reversal of 138930536 is 635039831.

It can be written as a sum of positive squares in only one way, i.e., 120868036 + 18062500 = 10994^2 + 4250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 138930536.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8683151 + ... + 8683166.

Almost surely, 2^138930536 is an apocalyptic number.

It is an amenable number.

138930536 is a deficient number, since it is larger than the sum of its proper divisors (121564234).

138930536 is a wasteful number, since it uses less digits than its factorization.

138930536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17366323 (or 17366319 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 138930536 is about 11786.8798246186. The cubic root of 138930536 is about 517.9238420556.

The spelling of 138930536 in words is "one hundred thirty-eight million, nine hundred thirty thousand, five hundred thirty-six".