138243676 has 6 divisors (see below), whose sum is σ = 241926440. Its totient is φ = 69121836.

The previous prime is 138243659. The next prime is 138243683. The reversal of 138243676 is 676342831.

It is a super-2 number, since 2×138243676² = 38222627907985952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17280456 + ... + 17280463.

Almost surely, 2^138243676 is an apocalyptic number.

It is an amenable number.

138243676 is a deficient number, since it is larger than the sum of its proper divisors (103682764).

138243676 is a wasteful number, since it uses less digits than its factorization.

138243676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34560923 (or 34560921 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 138243676 is about 11757.7070893946. The cubic root of 138243676 is about 517.0689087279.

The spelling of 138243676 in words is "one hundred thirty-eight million, two hundred forty-three thousand, six hundred seventy-six".