208190871 has 64 divisors (see below), whose sum is σ = 376012800. Its totient is φ = 111263328.

The previous prime is 208190869. The next prime is 208190887. The reversal of 208190871 is 178091802.

It is not a de Polignac number, because 208190871 - 2¹ = 208190869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208190071) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 203800 + ... + 204818.

It is an arithmetic number, because the mean of its divisors is an integer number (5875200).

Almost surely, 2^208190871 is an apocalyptic number.

208190871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

208190871 is a deficient number, since it is larger than the sum of its proper divisors (167821929).

208190871 is a wasteful number, since it uses less digits than its factorization.

208190871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 208190871 is about 14428.8208457933. The cubic root of 208190871 is about 592.6803937174.

The spelling of 208190871 in words is "two hundred eight million, one hundred ninety thousand, eight hundred seventy-one".