208138012 has 12 divisors (see below), whose sum is σ = 364661136. Its totient is φ = 103949120.

The previous prime is 208138003. The next prime is 208138019. The reversal of 208138012 is 210831802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208138019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26008 + ... + 33055.

It is an arithmetic number, because the mean of its divisors is an integer number (30388428).

Almost surely, 2^208138012 is an apocalyptic number.

It is an amenable number.

208138012 is a deficient number, since it is larger than the sum of its proper divisors (156523124).

208138012 is a wasteful number, since it uses less digits than its factorization.

208138012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59948 (or 59946 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 208138012 is about 14426.9890136508. The cubic root of 208138012 is about 592.6302295827.

Adding to 208138012 its reverse (210831802), we get a palindrome (418969814).

The spelling of 208138012 in words is "two hundred eight million, one hundred thirty-eight thousand, twelve".