138371766 has 16 divisors (see below), whose sum is σ = 298031664. Its totient is φ = 42575904.

The previous prime is 138371759. The next prime is 138371791. The reversal of 138371766 is 667173831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886921 + ... + 887076.

It is an arithmetic number, because the mean of its divisors is an integer number (18626979).

Almost surely, 2^138371766 is an apocalyptic number.

138371766 is an abundant number, since it is smaller than the sum of its proper divisors (159659898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138371766 is a wasteful number, since it uses less digits than its factorization.

138371766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774015.

The product of its digits is 127008, while the sum is 42.

The square root of 138371766 is about 11763.1528936761. The cubic root of 138371766 is about 517.2285565646.

The spelling of 138371766 in words is "one hundred thirty-eight million, three hundred seventy-one thousand, seven hundred sixty-six".