138864814 has 16 divisors (see below), whose sum is σ = 229360896. Its totient is φ = 62529400.

The previous prime is 138864793. The next prime is 138864821. The reversal of 138864814 is 418468831.

It is a super-3 number, since 3×138864814³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 27142 + ... + 31849.

It is an arithmetic number, because the mean of its divisors is an integer number (14335056).

Almost surely, 2^138864814 is an apocalyptic number.

138864814 is a deficient number, since it is larger than the sum of its proper divisors (90496082).

138864814 is a wasteful number, since it uses less digits than its factorization.

138864814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59111.

The product of its digits is 147456, while the sum is 43.

The square root of 138864814 is about 11784.0915644779. The cubic root of 138864814 is about 517.8421600856.

The spelling of 138864814 in words is "one hundred thirty-eight million, eight hundred sixty-four thousand, eight hundred fourteen".