208864394 has 4 divisors (see below), whose sum is σ = 313296594. Its totient is φ = 104432196.

The previous prime is 208864339. The next prime is 208864423. The reversal of 208864394 is 493468802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 174583369 + 34281025 = 13213^2 + 5855^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 52216097 + ... + 52216100.

Almost surely, 2^208864394 is an apocalyptic number.

208864394 is a deficient number, since it is larger than the sum of its proper divisors (104432200).

208864394 is a wasteful number, since it uses less digits than its factorization.

208864394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104432199.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 208864394 is about 14452.1415022134. The cubic root of 208864394 is about 593.3188369840.

The spelling of 208864394 in words is "two hundred eight million, eight hundred sixty-four thousand, three hundred ninety-four".