138646588 has 12 divisors (see below), whose sum is σ = 242771760. Its totient is φ = 69283232.

The previous prime is 138646579. The next prime is 138646589. The reversal of 138646588 is 885646831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138646589) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1408 + ... + 16711.

It is an arithmetic number, because the mean of its divisors is an integer number (20230980).

Almost surely, 2^138646588 is an apocalyptic number.

It is an amenable number.

138646588 is a deficient number, since it is larger than the sum of its proper divisors (104125172).

138646588 is a wasteful number, since it uses less digits than its factorization.

138646588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20036 (or 20034 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 138646588 is about 11774.8285762469. The cubic root of 138646588 is about 517.5707549487.

It can be divided in two parts, 1386 and 46588, that added together give a palindrome (47974).

The spelling of 138646588 in words is "one hundred thirty-eight million, six hundred forty-six thousand, five hundred eighty-eight".