138078064 has 20 divisors (see below), whose sum is σ = 267944656. Its totient is φ = 68931072.

The previous prime is 138078049. The next prime is 138078067. The reversal of 138078064 is 460870831.

It is a happy number.

138078064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138078067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4357 + ... + 17179.

Almost surely, 2^138078064 is an apocalyptic number.

It is an amenable number.

138078064 is a deficient number, since it is larger than the sum of its proper divisors (129866592).

138078064 is a wasteful number, since it uses less digits than its factorization.

138078064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13504 (or 13498 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 138078064 is about 11750.6622792079. The cubic root of 138078064 is about 516.8623482626.

The spelling of 138078064 in words is "one hundred thirty-eight million, seventy-eight thousand, sixty-four".