138517430 has 16 divisors (see below), whose sum is σ = 249960384. Its totient is φ = 55267200.

The previous prime is 138517373. The next prime is 138517433. The reversal of 138517430 is 34715831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138517433) 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 7 ways as a sum of consecutive naturals, for example, 13262 + ... + 21281.

It is an arithmetic number, because the mean of its divisors is an integer number (15622524).

Almost surely, 2^138517430 is an apocalyptic number.

138517430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138517430 is a deficient number, since it is larger than the sum of its proper divisors (111442954).

138517430 is a wasteful number, since it uses less digits than its factorization.

138517430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34951.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 138517430 is about 11769.3428023828. The cubic root of 138517430 is about 517.4099884677.

The spelling of 138517430 in words is "one hundred thirty-eight million, five hundred seventeen thousand, four hundred thirty".