216863798 has 16 divisors (see below), whose sum is σ = 356309280. Its totient is φ = 98534016.

The previous prime is 216863797. The next prime is 216863809. The reversal of 216863798 is 897368612.

216863798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216863797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108986 + ... + 110957.

It is an arithmetic number, because the mean of its divisors is an integer number (22269330).

Almost surely, 2^216863798 is an apocalyptic number.

216863798 is a deficient number, since it is larger than the sum of its proper divisors (139445482).

216863798 is a wasteful number, since it uses less digits than its factorization.

216863798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219991.

The product of its digits is 870912, while the sum is 50.

The square root of 216863798 is about 14726.2961398989. The cubic root of 216863798 is about 600.7987491574.

The spelling of 216863798 in words is "two hundred sixteen million, eight hundred sixty-three thousand, seven hundred ninety-eight".