138000015 has 24 divisors (see below), whose sum is σ = 240085248. Its totient is φ = 73327680.

The previous prime is 138000013. The next prime is 138000053. The reversal of 138000015 is 510000831.

It is a happy number.

It is not a de Polignac number, because 138000015 - 2¹ = 138000013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138000013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6930 + ... + 18000.

It is an arithmetic number, because the mean of its divisors is an integer number (10003552).

Almost surely, 2^138000015 is an apocalyptic number.

138000015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138000015 is a deficient number, since it is larger than the sum of its proper divisors (102085233).

138000015 is a wasteful number, since it uses less digits than its factorization.

138000015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11359 (or 11356 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 138000015 is about 11747.3407629131. The cubic root of 138000015 is about 516.7649439597.

Adding to 138000015 its reverse (510000831), we get a palindrome (648000846).

The spelling of 138000015 in words is "one hundred thirty-eight million, fifteen", and thus it is an aban number.