138188414 has 32 divisors (see below), whose sum is σ = 262024896. Its totient is φ = 53187840.

The previous prime is 138188389. The next prime is 138188429. The reversal of 138188414 is 414881831.

It is a happy number.

It is a Cunningham number, because it is equal to 517³+1.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3527 + ... + 16994.

It is an arithmetic number, because the mean of its divisors is an integer number (8188278).

Almost surely, 2^138188414 is an apocalyptic number.

138188414 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138188414 is a deficient number, since it is larger than the sum of its proper divisors (123836482).

138188414 is a wasteful number, since it uses less digits than its factorization.

138188414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20580.

The product of its digits is 24576, while the sum is 38.

The square root of 138188414 is about 11755.3568214665. The cubic root of 138188414 is about 517.0000012471. Note that the first 5 decimals are identical.

The spelling of 138188414 in words is "one hundred thirty-eight million, one hundred eighty-eight thousand, four hundred fourteen".