216789830 has 8 divisors (see below), whose sum is σ = 390221712. Its totient is φ = 86715928.

The previous prime is 216789817. The next prime is 216789841. The reversal of 216789830 is 38987612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

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 3 ways as a sum of consecutive naturals, for example, 10839482 + ... + 10839501.

It is an arithmetic number, because the mean of its divisors is an integer number (48777714).

Almost surely, 2^216789830 is an apocalyptic number.

216789830 is a deficient number, since it is larger than the sum of its proper divisors (173431882).

216789830 is a wasteful number, since it uses less digits than its factorization.

216789830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21678990.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 216789830 is about 14723.7844999171. The cubic root of 216789830 is about 600.7304344890.

The spelling of 216789830 in words is "two hundred sixteen million, seven hundred eighty-nine thousand, eight hundred thirty".