138201804 has 72 divisors (see below), whose sum is σ = 378378000. Its totient is φ = 42279552.

The previous prime is 138201803. The next prime is 138201829. The reversal of 138201804 is 408102831.

It is not an unprimeable number, because it can be changed into a prime (138201803) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 91447 + ... + 92945.

It is an arithmetic number, because the mean of its divisors is an integer number (5255250).

Almost surely, 2^138201804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138201804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189189000).

138201804 is an abundant number, since it is smaller than the sum of its proper divisors (240176196).

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

138201804 is a wasteful number, since it uses less digits than its factorization.

138201804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1714 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 138201804 is about 11755.9263352575. The cubic root of 138201804 is about 517.0166992375.

The spelling of 138201804 in words is "one hundred thirty-eight million, two hundred one thousand, eight hundred four".