216863794 has 16 divisors (see below), whose sum is σ = 371984256. Its totient is φ = 92887200.

The previous prime is 216863789. The next prime is 216863797. The reversal of 216863794 is 497368612.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28539 + ... + 35329.

It is an arithmetic number, because the mean of its divisors is an integer number (23249016).

Almost surely, 2^216863794 is an apocalyptic number.

216863794 is a deficient number, since it is larger than the sum of its proper divisors (155120462).

216863794 is a wasteful number, since it uses less digits than its factorization.

216863794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9081.

The product of its digits is 435456, while the sum is 46.

The square root of 216863794 is about 14726.2960040874. The cubic root of 216863794 is about 600.7987454636.

The spelling of 216863794 in words is "two hundred sixteen million, eight hundred sixty-three thousand, seven hundred ninety-four".