208828394 has 4 divisors (see below), whose sum is σ = 313242594. Its totient is φ = 104414196.

The previous prime is 208828387. The next prime is 208828397. The reversal of 208828394 is 493828802.

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., 193905625 + 14922769 = 13925^2 + 3863^2 .

It is not an unprimeable number, because it can be changed into a prime (208828397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52207097 + ... + 52207100.

Almost surely, 2^208828394 is an apocalyptic number.

208828394 is a deficient number, since it is larger than the sum of its proper divisors (104414200).

208828394 is a wasteful number, since it uses less digits than its factorization.

208828394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104414199.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 208828394 is about 14450.8959583826. The cubic root of 208828394 is about 593.2847467544.

The spelling of 208828394 in words is "two hundred eight million, eight hundred twenty-eight thousand, three hundred ninety-four".