138276224 has 32 divisors (see below), whose sum is σ = 289975800. Its totient is φ = 65498112.

The previous prime is 138276223. The next prime is 138276233. The reversal of 138276224 is 422672831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138276221) 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 in 3 ways as a sum of consecutive naturals, for example, 25997 + ... + 30860.

Almost surely, 2^138276224 is an apocalyptic number.

It is an amenable number.

138276224 is an abundant number, since it is smaller than the sum of its proper divisors (151699576).

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

138276224 is an equidigital number, since it uses as much as digits as its factorization.

138276224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56890 (or 56878 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 138276224 is about 11759.0911213410. The cubic root of 138276224 is about 517.1094849980.

The spelling of 138276224 in words is "one hundred thirty-eight million, two hundred seventy-six thousand, two hundred twenty-four".