138283786 has 16 divisors (see below), whose sum is σ = 223423200. Its totient is φ = 63978768.

The previous prime is 138283759. The next prime is 138283793. The reversal of 138283786 is 687382831.

138283786 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 40681 + ... + 43948.

It is an arithmetic number, because the mean of its divisors is an integer number (13963950).

Almost surely, 2^138283786 is an apocalyptic number.

138283786 is a deficient number, since it is larger than the sum of its proper divisors (85139414).

138283786 is a wasteful number, since it uses less digits than its factorization.

138283786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84693.

The product of its digits is 387072, while the sum is 46.

The square root of 138283786 is about 11759.4126554008. The cubic root of 138283786 is about 517.1189113249.

The spelling of 138283786 in words is "one hundred thirty-eight million, two hundred eighty-three thousand, seven hundred eighty-six".