138656335 has 32 divisors (see below), whose sum is σ = 184011264. Its totient is φ = 99840000.

The previous prime is 138656333. The next prime is 138656339. The reversal of 138656335 is 533656831.

138656335 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138656335 - 2¹ = 138656333 is a prime.

Its product of digits (194400) is a multiple of the sum of its prime divisors (675).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138656333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265875 + ... + 266395.

It is an arithmetic number, because the mean of its divisors is an integer number (5750352).

Almost surely, 2^138656335 is an apocalyptic number.

138656335 is a deficient number, since it is larger than the sum of its proper divisors (45354929).

138656335 is a wasteful number, since it uses less digits than its factorization.

138656335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its digits is 194400, while the sum is 40.

The square root of 138656335 is about 11775.2424603487. The cubic root of 138656335 is about 517.5828832528.

The spelling of 138656335 in words is "one hundred thirty-eight million, six hundred fifty-six thousand, three hundred thirty-five".