138660414 has 16 divisors (see below), whose sum is σ = 278716800. Its totient is φ = 45987480.

The previous prime is 138660413. The next prime is 138660437. The reversal of 138660414 is 414066831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138660413) 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, 56872 + ... + 59259.

It is an arithmetic number, because the mean of its divisors is an integer number (17419800).

Almost surely, 2^138660414 is an apocalyptic number.

138660414 is an abundant number, since it is smaller than the sum of its proper divisors (140056386).

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

138660414 is a wasteful number, since it uses less digits than its factorization.

138660414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116335.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 138660414 is about 11775.4156614533. The cubic root of 138660414 is about 517.5879586306.

The spelling of 138660414 in words is "one hundred thirty-eight million, six hundred sixty thousand, four hundred fourteen".