208120812 has 12 divisors (see below), whose sum is σ = 485615256. Its totient is φ = 69373600.

The previous prime is 208120811. The next prime is 208120823. The reversal of 208120812 is 218021802.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (208120811) 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, 8671689 + ... + 8671712.

It is an arithmetic number, because the mean of its divisors is an integer number (40467938).

Almost surely, 2^208120812 is an apocalyptic number.

It is an amenable number.

208120812 is an abundant number, since it is smaller than the sum of its proper divisors (277494444).

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

208120812 is a wasteful number, since it uses less digits than its factorization.

208120812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17343408 (or 17343406 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 208120812 is about 14426.3928963549. The cubic root of 208120812 is about 592.6139046442.

The spelling of 208120812 in words is "two hundred eight million, one hundred twenty thousand, eight hundred twelve".