138783236 has 12 divisors (see below), whose sum is σ = 243288528. Its totient is φ = 69272232.

The previous prime is 138783157. The next prime is 138783247. The reversal of 138783236 is 632387831.

It is a junction number, because it is equal to n+sod(n) for n = 138783193 and 138783202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27206 + ... + 31901.

It is an arithmetic number, because the mean of its divisors is an integer number (20274044).

Almost surely, 2^138783236 is an apocalyptic number.

It is an amenable number.

138783236 is a deficient number, since it is larger than the sum of its proper divisors (104505292).

138783236 is a wasteful number, since it uses less digits than its factorization.

138783236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59698 (or 59696 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 138783236 is about 11780.6296945452. The cubic root of 138783236 is about 517.7407357781.

The spelling of 138783236 in words is "one hundred thirty-eight million, seven hundred eighty-three thousand, two hundred thirty-six".