138027615 has 32 divisors (see below), whose sum is σ = 243993600. Its totient is φ = 66069120.

The previous prime is 138027611. The next prime is 138027677. The reversal of 138027615 is 516720831.

It is not a de Polignac number, because 138027615 - 2² = 138027611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138027611) 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 31 ways as a sum of consecutive naturals, for example, 7741 + ... + 18329.

It is an arithmetic number, because the mean of its divisors is an integer number (7624800).

Almost surely, 2^138027615 is an apocalyptic number.

138027615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138027615 is a deficient number, since it is larger than the sum of its proper divisors (105965985).

138027615 is a wasteful number, since it uses less digits than its factorization.

138027615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 138027615 is about 11748.5154381309. The cubic root of 138027615 is about 516.7993926558.

It can be divided in two parts, 1380276 and 15, that added together give a triangular number (1380291 = T₁₆₆₁).

The spelling of 138027615 in words is "one hundred thirty-eight million, twenty-seven thousand, six hundred fifteen".