216489366 has 48 divisors (see below), whose sum is σ = 483638688. Its totient is φ = 69955200.

The previous prime is 216489323. The next prime is 216489397. The reversal of 216489366 is 663984612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76570 + ... + 79346.

It is an arithmetic number, because the mean of its divisors is an integer number (10075806).

Almost surely, 2^216489366 is an apocalyptic number.

216489366 is an abundant number, since it is smaller than the sum of its proper divisors (267149322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216489366 is a wasteful number, since it uses less digits than its factorization.

216489366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917 (or 2914 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 216489366 is about 14713.5776070947. The cubic root of 216489366 is about 600.4527749055.

The spelling of 216489366 in words is "two hundred sixteen million, four hundred eighty-nine thousand, three hundred sixty-six".