138181835 has 32 divisors (see below), whose sum is σ = 186278400. Its totient is φ = 97551360.

The previous prime is 138181829. The next prime is 138181853. The reversal of 138181835 is 538181831.

It is not a de Polignac number, because 138181835 - 2²⁰ = 137133259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314546 + ... + 314984.

It is an arithmetic number, because the mean of its divisors is an integer number (5821200).

Almost surely, 2^138181835 is an apocalyptic number.

138181835 is a deficient number, since it is larger than the sum of its proper divisors (48096565).

138181835 is a wasteful number, since it uses less digits than its factorization.

138181835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its digits is 23040, while the sum is 38.

The square root of 138181835 is about 11755.0769882634. The cubic root of 138181835 is about 516.9917965144.

The spelling of 138181835 in words is "one hundred thirty-eight million, one hundred eighty-one thousand, eight hundred thirty-five".