138501236 has 6 divisors (see below), whose sum is σ = 242377170. Its totient is φ = 69250616.

The previous prime is 138501229. The next prime is 138501257. The reversal of 138501236 is 632105831.

It can be written as a sum of positive squares in only one way, i.e., 134420836 + 4080400 = 11594^2 + 2020^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138501199 and 138501208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17312651 + ... + 17312658.

It is an arithmetic number, because the mean of its divisors is an integer number (40396195).

Almost surely, 2^138501236 is an apocalyptic number.

It is an amenable number.

138501236 is a deficient number, since it is larger than the sum of its proper divisors (103875934).

138501236 is a wasteful number, since it uses less digits than its factorization.

138501236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34625313 (or 34625311 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 138501236 is about 11768.6548084307. The cubic root of 138501236 is about 517.3898243052.

The spelling of 138501236 in words is "one hundred thirty-eight million, five hundred one thousand, two hundred thirty-six".