138266816 has 14 divisors (see below), whose sum is σ = 274373340. Its totient is φ = 69133376.

The previous prime is 138266773. The next prime is 138266833. The reversal of 138266816 is 618662831.

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 as a sum of consecutive naturals, namely, 1080146 + ... + 1080273.

Almost surely, 2^138266816 is an apocalyptic number.

138266816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138266816 is a deficient number, since it is larger than the sum of its proper divisors (136106524).

138266816 is an equidigital number, since it uses as much as digits as its factorization.

138266816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160431 (or 2160421 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 138266816 is about 11758.6910836198. The cubic root of 138266816 is about 517.0977570807.

The spelling of 138266816 in words is "one hundred thirty-eight million, two hundred sixty-six thousand, eight hundred sixteen".