216803408 has 40 divisors (see below), whose sum is σ = 433097280. Its totient is φ = 105071360.

The previous prime is 216803383. The next prime is 216803423. The reversal of 216803408 is 804308612.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 108563 + ... + 110541.

It is an arithmetic number, because the mean of its divisors is an integer number (10827432).

Almost surely, 2^216803408 is an apocalyptic number.

It is an amenable number.

216803408 is a deficient number, since it is larger than the sum of its proper divisors (216293872).

216803408 is a wasteful number, since it uses less digits than its factorization.

216803408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 216803408 is about 14724.2455833907. The cubic root of 216803408 is about 600.7429758946.

The spelling of 216803408 in words is "two hundred sixteen million, eight hundred three thousand, four hundred eight".