138033805 has 16 divisors (see below), whose sum is σ = 203865984. Its totient is φ = 87370560.

The previous prime is 138033799. The next prime is 138033859. The reversal of 138033805 is 508330831.

It is not a de Polignac number, because 138033805 - 2⁹ = 138033293 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 151231 + ... + 152140.

It is an arithmetic number, because the mean of its divisors is an integer number (12741624).

Almost surely, 2^138033805 is an apocalyptic number.

It is an amenable number.

138033805 is a deficient number, since it is larger than the sum of its proper divisors (65832179).

138033805 is a wasteful number, since it uses less digits than its factorization.

138033805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303396.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 138033805 is about 11748.7788727169. The cubic root of 138033805 is about 516.8071180191.

The spelling of 138033805 in words is "one hundred thirty-eight million, thirty-three thousand, eight hundred five".