138435568 has 10 divisors (see below), whose sum is σ = 268218944. Its totient is φ = 69217776.

The previous prime is 138435547. The next prime is 138435569. The reversal of 138435568 is 865534831.

138435568 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138435569) by changing a digit.

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 as a sum of consecutive naturals, namely, 4326096 + ... + 4326127.

Almost surely, 2^138435568 is an apocalyptic number.

It is an amenable number.

138435568 is a deficient number, since it is larger than the sum of its proper divisors (129783376).

138435568 is an equidigital number, since it uses as much as digits as its factorization.

138435568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8652231 (or 8652225 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 138435568 is about 11765.8645241223. The cubic root of 138435568 is about 517.3080408567.

The spelling of 138435568 in words is "one hundred thirty-eight million, four hundred thirty-five thousand, five hundred sixty-eight".