208400804 has 12 divisors (see below), whose sum is σ = 364828800. Its totient is φ = 104164008.

The previous prime is 208400791. The next prime is 208400809. The reversal of 208400804 is 408004802.

It is not an unprimeable number, because it can be changed into a prime (208400809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6917 + ... + 21555.

It is an arithmetic number, because the mean of its divisors is an integer number (30402400).

Almost surely, 2^208400804 is an apocalyptic number.

It is an amenable number.

208400804 is a deficient number, since it is larger than the sum of its proper divisors (156427996).

208400804 is a wasteful number, since it uses less digits than its factorization.

208400804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18202 (or 18200 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 208400804 is about 14436.0937929898. The cubic root of 208400804 is about 592.8795400977.

The spelling of 208400804 in words is "two hundred eight million, four hundred thousand, eight hundred four".