138231296 has 40 divisors (see below), whose sum is σ = 315656880. Its totient is φ = 59240448.

The previous prime is 138231239. The next prime is 138231319. The reversal of 138231296 is 692132831.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 15701 + ... + 22868.

It is an arithmetic number, because the mean of its divisors is an integer number (7891422).

Almost surely, 2^138231296 is an apocalyptic number.

138231296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138231296 is an abundant number, since it is smaller than the sum of its proper divisors (177425584).

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

138231296 is an frugal number, since it uses more digits than its factorization.

138231296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38594 (or 38578 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 138231296 is about 11757.1806144160. The cubic root of 138231296 is about 517.0534734126.

The spelling of 138231296 in words is "one hundred thirty-eight million, two hundred thirty-one thousand, two hundred ninety-six".