138588804 has 36 divisors (see below), whose sum is σ = 352273740. Its totient is φ = 45938880.

The previous prime is 138588803. The next prime is 138588839. The reversal of 138588804 is 408885831.

It can be written as a sum of positive squares in 2 ways, for example, as 30470400 + 108118404 = 5520^2 + 10398^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 138588804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138588803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4119 + ... + 17150.

Almost surely, 2^138588804 is an apocalyptic number.

It is an amenable number.

138588804 is an abundant number, since it is smaller than the sum of its proper divisors (213684936).

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

138588804 is a wasteful number, since it uses less digits than its factorization.

138588804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21460 (or 21455 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 138588804 is about 11772.3746117765. The cubic root of 138588804 is about 517.4988419774.

The spelling of 138588804 in words is "one hundred thirty-eight million, five hundred eighty-eight thousand, eight hundred four".