138195044 has 24 divisors (see below), whose sum is σ = 262445568. Its totient is φ = 63292320.

The previous prime is 138195019. The next prime is 138195047. The reversal of 138195044 is 440591831.

It is a junction number, because it is equal to n+sod(n) for n = 138194995 and 138195013.

It is not an unprimeable number, because it can be changed into a prime (138195047) 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 in 7 ways as a sum of consecutive naturals, for example, 3332 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (10935232).

Almost surely, 2^138195044 is an apocalyptic number.

It is an amenable number.

138195044 is a deficient number, since it is larger than the sum of its proper divisors (124250524).

138195044 is a wasteful number, since it uses less digits than its factorization.

138195044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20435 (or 20433 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 138195044 is about 11755.6388171805. The cubic root of 138195044 is about 517.0082693189.

The spelling of 138195044 in words is "one hundred thirty-eight million, one hundred ninety-five thousand, forty-four".