138519424 has 32 divisors (see below), whose sum is σ = 290485800. Its totient is φ = 65613312.

The previous prime is 138519421. The next prime is 138519431. The reversal of 138519424 is 424915831.

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 (138519421) 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, 26047 + ... + 30910.

Almost surely, 2^138519424 is an apocalyptic number.

It is an amenable number.

138519424 is an abundant number, since it is smaller than the sum of its proper divisors (151966376).

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

138519424 is an equidigital number, since it uses as much as digits as its factorization.

138519424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56990 (or 56978 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 138519424 is about 11769.4275136899. The cubic root of 138519424 is about 517.4124712132.

The spelling of 138519424 in words is "one hundred thirty-eight million, five hundred nineteen thousand, four hundred twenty-four".