138235085 has 8 divisors (see below), whose sum is σ = 166876416. Its totient is φ = 109925200.

The previous prime is 138235081. The next prime is 138235087. The reversal of 138235085 is 580532831.

138235085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138235085 - 2² = 138235081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138235081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81941 + ... + 83610.

It is an arithmetic number, because the mean of its divisors is an integer number (20859552).

Almost surely, 2^138235085 is an apocalyptic number.

It is an amenable number.

138235085 is a deficient number, since it is larger than the sum of its proper divisors (28641331).

138235085 is a wasteful number, since it uses less digits than its factorization.

138235085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165723.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 138235085 is about 11757.3417488818. The cubic root of 138235085 is about 517.0581976146.

The spelling of 138235085 in words is "one hundred thirty-eight million, two hundred thirty-five thousand, eighty-five".