208191012 has 24 divisors (see below), whose sum is σ = 496116096. Its totient is φ = 67920288.

The previous prime is 208191001. The next prime is 208191017. The reversal of 208191012 is 210191802.

It is not an unprimeable number, because it can be changed into a prime (208191017) 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 7 ways as a sum of consecutive naturals, for example, 184003 + ... + 185130.

It is an arithmetic number, because the mean of its divisors is an integer number (20671504).

Almost surely, 2^208191012 is an apocalyptic number.

It is an amenable number.

208191012 is an abundant number, since it is smaller than the sum of its proper divisors (287925084).

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

208191012 is a wasteful number, since it uses less digits than its factorization.

208191012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369187 (or 369185 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 208191012 is about 14428.8257318466. The cubic root of 208191012 is about 592.6805275176.

The spelling of 208191012 in words is "two hundred eight million, one hundred ninety-one thousand, twelve".