138375424 has 36 divisors (see below), whose sum is σ = 301326480. Its totient is φ = 62896640.

The previous prime is 138375371. The next prime is 138375467. The reversal of 138375424 is 424573831.

It is a happy 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, 21754 + ... + 27385.

It is an arithmetic number, because the mean of its divisors is an integer number (8370180).

Almost surely, 2^138375424 is an apocalyptic number.

It is an amenable number.

138375424 is an abundant number, since it is smaller than the sum of its proper divisors (162951056).

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

138375424 is an equidigital number, since it uses as much as digits as its factorization.

138375424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49166 (or 49152 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 138375424 is about 11763.3083781732. The cubic root of 138375424 is about 517.2331143474.

The spelling of 138375424 in words is "one hundred thirty-eight million, three hundred seventy-five thousand, four hundred twenty-four".