138435385 has 8 divisors (see below), whose sum is σ = 181224576. Its totient is φ = 100680240.

The previous prime is 138435371. The next prime is 138435397. The reversal of 138435385 is 583534831.

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

It is a de Polignac number, because none of the positive numbers 2^k-138435385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1258449 + ... + 1258558.

It is an arithmetic number, because the mean of its divisors is an integer number (22653072).

Almost surely, 2^138435385 is an apocalyptic number.

It is an amenable number.

138435385 is a deficient number, since it is larger than the sum of its proper divisors (42789191).

138435385 is a wasteful number, since it uses less digits than its factorization.

138435385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517023.

The product of its digits is 172800, while the sum is 40.

The square root of 138435385 is about 11765.8567473856. The cubic root of 138435385 is about 517.3078129109.

The spelling of 138435385 in words is "one hundred thirty-eight million, four hundred thirty-five thousand, three hundred eighty-five".