216790 has 32 divisors (see below), whose sum is σ = 472320. Its totient is φ = 69984.

The previous prime is 216787. The next prime is 216791. The reversal of 216790 is 97612.

216790 is nontrivially palindromic in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216791) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1249 + ... + 1411.

It is an arithmetic number, because the mean of its divisors is an integer number (14760).

2²¹⁶⁷⁹⁰ is an apocalyptic number.

216790 is an abundant number, since it is smaller than the sum of its proper divisors (255530).

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

216790 is a wasteful number, since it uses less digits than its factorization.

216790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 216790 is about 465.6071305296. The cubic root of 216790 is about 60.0730591514.

The spelling of 216790 in words is "two hundred sixteen thousand, seven hundred ninety".