208891916 has 6 divisors (see below), whose sum is σ = 365560860. Its totient is φ = 104445956.

The previous prime is 208891897. The next prime is 208891933. The reversal of 208891916 is 619198802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26111486 + ... + 26111493.

It is an arithmetic number, because the mean of its divisors is an integer number (60926810).

Almost surely, 2^208891916 is an apocalyptic number.

It is an amenable number.

208891916 is a deficient number, since it is larger than the sum of its proper divisors (156668944).

208891916 is a wasteful number, since it uses less digits than its factorization.

208891916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52222983 (or 52222981 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 208891916 is about 14453.0936480741. The cubic root of 208891916 is about 593.3448963225.

The spelling of 208891916 in words is "two hundred eight million, eight hundred ninety-one thousand, nine hundred sixteen".