138540084 has 48 divisors (see below), whose sum is σ = 329056896. Its totient is φ = 45360000.

The previous prime is 138540041. The next prime is 138540133. The reversal of 138540084 is 480045831.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 182634 + ... + 183390.

It is an arithmetic number, because the mean of its divisors is an integer number (6855352).

Almost surely, 2^138540084 is an apocalyptic number.

It is an amenable number.

138540084 is an abundant number, since it is smaller than the sum of its proper divisors (190516812).

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

138540084 is a wasteful number, since it uses less digits than its factorization.

138540084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 138540084 is about 11770.3051787114. The cubic root of 138540084 is about 517.4381937435.

The spelling of 138540084 in words is "one hundred thirty-eight million, five hundred forty thousand, eighty-four".