208013868 has 36 divisors (see below), whose sum is σ = 543947040. Its totient is φ = 66946656.

The previous prime is 208013867. The next prime is 208013891. The reversal of 208013868 is 868310802.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (208013867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98580 + ... + 100667.

It is an arithmetic number, because the mean of its divisors is an integer number (15109640).

Almost surely, 2^208013868 is an apocalyptic number.

It is an amenable number.

208013868 is an abundant number, since it is smaller than the sum of its proper divisors (335933172).

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

208013868 is a wasteful number, since it uses less digits than its factorization.

208013868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199286 (or 199281 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 208013868 is about 14422.6858802374. The cubic root of 208013868 is about 592.5123813041.

The spelling of 208013868 in words is "two hundred eight million, thirteen thousand, eight hundred sixty-eight".