208109104 has 80 divisors (see below), whose sum is σ = 504878400. Its totient is φ = 81027072.

The previous prime is 208109101. The next prime is 208109113. The reversal of 208109104 is 401901802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (208109101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53332 + ... + 57100.

It is an arithmetic number, because the mean of its divisors is an integer number (6310980).

Almost surely, 2^208109104 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 208109104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252439200).

208109104 is an abundant number, since it is smaller than the sum of its proper divisors (296769296).

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

208109104 is a wasteful number, since it uses less digits than its factorization.

208109104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830 (or 3824 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 208109104 is about 14425.9871066073. The cubic root of 208109104 is about 592.6027917820.

The spelling of 208109104 in words is "two hundred eight million, one hundred nine thousand, one hundred four".