138780084 has 24 divisors (see below), whose sum is σ = 324647008. Its totient is φ = 46141920.

The previous prime is 138780077. The next prime is 138780101. The reversal of 138780084 is 480087831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9802 + ... + 19329.

Almost surely, 2^138780084 is an apocalyptic number.

It is an amenable number.

138780084 is an abundant number, since it is smaller than the sum of its proper divisors (185866924).

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

138780084 is a wasteful number, since it uses less digits than its factorization.

138780084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29535 (or 29533 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 138780084 is about 11780.4959148586. The cubic root of 138780084 is about 517.7368161617.

The spelling of 138780084 in words is "one hundred thirty-eight million, seven hundred eighty thousand, eighty-four".