138000688 has 40 divisors (see below), whose sum is σ = 306221472. Its totient is φ = 59017728.

The previous prime is 138000683. The next prime is 138000689. The reversal of 138000688 is 886000831.

It is a super-3 number, since 3×138000688³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (138000683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68106 + ... + 70102.

Almost surely, 2^138000688 is an apocalyptic number.

It is an amenable number.

138000688 is an abundant number, since it is smaller than the sum of its proper divisors (168220784).

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

138000688 is a wasteful number, since it uses less digits than its factorization.

138000688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629 (or 2623 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 138000688 is about 11747.3694076589. The cubic root of 138000688 is about 516.7657840134.

The spelling of 138000688 in words is "one hundred thirty-eight million, six hundred eighty-eight", and thus it is an aban number.