138622442 has 16 divisors (see below), whose sum is σ = 250146240. Its totient is φ = 56282688.

The previous prime is 138622417. The next prime is 138622457. The reversal of 138622442 is 244226831.

It is a junction number, because it is equal to n+sod(n) for n = 138622399 and 138622408.

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 7 ways as a sum of consecutive naturals, for example, 260303 + ... + 260834.

It is an arithmetic number, because the mean of its divisors is an integer number (15634140).

Almost surely, 2^138622442 is an apocalyptic number.

138622442 is a deficient number, since it is larger than the sum of its proper divisors (111523798).

138622442 is a wasteful number, since it uses less digits than its factorization.

138622442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521165.

The product of its digits is 18432, while the sum is 32.

The square root of 138622442 is about 11773.8032088191. The cubic root of 138622442 is about 517.5407073550.

The spelling of 138622442 in words is "one hundred thirty-eight million, six hundred twenty-two thousand, four hundred forty-two".