138634342 has 32 divisors (see below), whose sum is σ = 260262144. Its totient is φ = 53805600.

The previous prime is 138634333. The next prime is 138634351. The reversal of 138634342 is 243436831.

138634342 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138634333) and next prime (138634351).

It is a junction number, because it is equal to n+sod(n) for n = 138634298 and 138634307.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 41992 + ... + 45172.

It is an arithmetic number, because the mean of its divisors is an integer number (8133192).

Almost surely, 2^138634342 is an apocalyptic number.

138634342 is a deficient number, since it is larger than the sum of its proper divisors (121627802).

138634342 is a wasteful number, since it uses less digits than its factorization.

138634342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484.

The product of its digits is 41472, while the sum is 34.

The square root of 138634342 is about 11774.3085571935. The cubic root of 138634342 is about 517.5555163045. Note that the first 4 decimals are identical.

The spelling of 138634342 in words is "one hundred thirty-eight million, six hundred thirty-four thousand, three hundred forty-two".