138177944 has 8 divisors (see below), whose sum is σ = 259083660. Its totient is φ = 69088968.

The previous prime is 138177917. The next prime is 138177959. The reversal of 138177944 is 449771831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 138177895 and 138177904.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 8636114 + ... + 8636129.

Almost surely, 2^138177944 is an apocalyptic number.

It is an amenable number.

138177944 is a deficient number, since it is larger than the sum of its proper divisors (120905716).

138177944 is a wasteful number, since it uses less digits than its factorization.

138177944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17272249 (or 17272245 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 138177944 is about 11754.9114841414. The cubic root of 138177944 is about 516.9869438892.

The spelling of 138177944 in words is "one hundred thirty-eight million, one hundred seventy-seven thousand, nine hundred forty-four".