138748224 has 56 divisors (see below), whose sum is σ = 377045728. Its totient is φ = 44997120.

The previous prime is 138748217. The next prime is 138748243. The reversal of 138748224 is 422847831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2662 + ... + 16869.

Almost surely, 2^138748224 is an apocalyptic number.

It is an amenable number.

138748224 is an abundant number, since it is smaller than the sum of its proper divisors (238297504).

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

138748224 is a wasteful number, since it uses less digits than its factorization.

138748224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19583 (or 19573 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 138748224 is about 11779.1436021470. The cubic root of 138748224 is about 517.6971938640.

The spelling of 138748224 in words is "one hundred thirty-eight million, seven hundred forty-eight thousand, two hundred twenty-four".