138864916 has 24 divisors (see below), whose sum is σ = 245589344. Its totient is φ = 68700960.

The previous prime is 138864911. The next prime is 138864917. The reversal of 138864916 is 619468831.

It is a super-3 number, since 3×138864916³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138864911) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 242911 + ... + 243481.

Almost surely, 2^138864916 is an apocalyptic number.

It is an amenable number.

138864916 is a deficient number, since it is larger than the sum of its proper divisors (106724428).

138864916 is a wasteful number, since it uses less digits than its factorization.

138864916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1109 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 138864916 is about 11784.0958923458. The cubic root of 138864916 is about 517.8422868753.

The spelling of 138864916 in words is "one hundred thirty-eight million, eight hundred sixty-four thousand, nine hundred sixteen".