138617115 has 64 divisors (see below), whose sum is σ = 275014656. Its totient is φ = 58056192.

The previous prime is 138617081. The next prime is 138617177. The reversal of 138617115 is 511716831.

It is not a de Polignac number, because 138617115 - 2⁶ = 138617051 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 235852 + ... + 236438.

It is an arithmetic number, because the mean of its divisors is an integer number (4297104).

Almost surely, 2^138617115 is an apocalyptic number.

138617115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138617115 is a deficient number, since it is larger than the sum of its proper divisors (136397541).

138617115 is a wasteful number, since it uses less digits than its factorization.

138617115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its digits is 5040, while the sum is 33.

The square root of 138617115 is about 11773.5769840775. The cubic root of 138617115 is about 517.5340778978.

The spelling of 138617115 in words is "one hundred thirty-eight million, six hundred seventeen thousand, one hundred fifteen".