216338 has 8 divisors (see below), whose sum is σ = 338688. Its totient is φ = 103444.

The previous prime is 216329. The next prime is 216347. The reversal of 216338 is 833612.

It is an interprime number because it is at equal distance from previous prime (216329) and next prime (216347).

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

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

216338 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2306 + ... + 2397.

It is an arithmetic number, because the mean of its divisors is an integer number (42336).

2²¹⁶³³⁸ is an apocalyptic number.

216338 is a deficient number, since it is larger than the sum of its proper divisors (122350).

216338 is a wasteful number, since it uses less digits than its factorization.

216338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4728.

The product of its digits is 864, while the sum is 23.

The square root of 216338 is about 465.1214895057. The cubic root of 216338 is about 60.0312799862.

The spelling of 216338 in words is "two hundred sixteen thousand, three hundred thirty-eight".