138704184 has 32 divisors (see below), whose sum is σ = 385290000. Its totient is φ = 46234656.

The previous prime is 138704183. The next prime is 138704213. The reversal of 138704184 is 481407831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138704183) by changing a digit.

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, 320859 + ... + 321290.

Almost surely, 2^138704184 is an apocalyptic number.

It is an amenable number.

138704184 is an abundant number, since it is smaller than the sum of its proper divisors (246585816).

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

138704184 is a wasteful number, since it uses less digits than its factorization.

138704184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642164 (or 642154 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 138704184 is about 11777.2740479281. The cubic root of 138704184 is about 517.6424140707.

The spelling of 138704184 in words is "one hundred thirty-eight million, seven hundred four thousand, one hundred eighty-four".