138513344 has 28 divisors (see below), whose sum is σ = 289331400. Its totient is φ = 65611008.

The previous prime is 138513341. The next prime is 138513379. The reversal of 138513344 is 443315831.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 138513344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138513341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55739 + ... + 58170.

Almost surely, 2^138513344 is an apocalyptic number.

It is an amenable number.

138513344 is an abundant number, since it is smaller than the sum of its proper divisors (150818056).

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

138513344 is a wasteful number, since it uses less digits than its factorization.

138513344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113940 (or 113930 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 138513344 is about 11769.1692145198. The cubic root of 138513344 is about 517.4049008818.

The spelling of 138513344 in words is "one hundred thirty-eight million, five hundred thirteen thousand, three hundred forty-four".