138606512 has 20 divisors (see below), whose sum is σ = 292964136. Its totient is φ = 63002880.

The previous prime is 138606511. The next prime is 138606541. The reversal of 138606512 is 215606831.

It is a happy number.

It is a super-2 number, since 2×138606512² = 38423530337612288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138606511) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 393593 + ... + 393944.

Almost surely, 2^138606512 is an apocalyptic number.

It is an amenable number.

138606512 is an abundant number, since it is smaller than the sum of its proper divisors (154357624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138606512 is a wasteful number, since it uses less digits than its factorization.

138606512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787556 (or 787550 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 138606512 is about 11773.1266875032. The cubic root of 138606512 is about 517.5208819473.

The spelling of 138606512 in words is "one hundred thirty-eight million, six hundred six thousand, five hundred twelve".