138723296 has 12 divisors (see below), whose sum is σ = 273111552. Its totient is φ = 69361632.

The previous prime is 138723293. The next prime is 138723331. The reversal of 138723296 is 692327831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138723293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2167520 + ... + 2167583.

It is an arithmetic number, because the mean of its divisors is an integer number (22759296).

Almost surely, 2^138723296 is an apocalyptic number.

138723296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138723296 is a deficient number, since it is larger than the sum of its proper divisors (134388256).

138723296 is an equidigital number, since it uses as much as digits as its factorization.

138723296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335113 (or 4335105 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 138723296 is about 11778.0854131731. The cubic root of 138723296 is about 517.6661882333. Note that the first 3 decimals are identical.

The spelling of 138723296 in words is "one hundred thirty-eight million, seven hundred twenty-three thousand, two hundred ninety-six".