138135684 has 24 divisors (see below), whose sum is σ = 322509600. Its totient is φ = 46017664.

The previous prime is 138135667. The next prime is 138135691. The reversal of 138135684 is 486531831.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 32092 + ... + 36140.

It is an arithmetic number, because the mean of its divisors is an integer number (13437900).

Almost surely, 2^138135684 is an apocalyptic number.

It is an amenable number.

138135684 is an abundant number, since it is smaller than the sum of its proper divisors (184373916).

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

138135684 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (138135683) it forms an eRAP, since the sums of their prime factors are consecutive (6898 and 6899).

138135684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6899 (or 6897 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 138135684 is about 11753.1138001808. The cubic root of 138135684 is about 516.9342338467.

The spelling of 138135684 in words is "one hundred thirty-eight million, one hundred thirty-five thousand, six hundred eighty-four".