216838 has 8 divisors (see below), whose sum is σ = 327600. Its totient is φ = 107640.

The previous prime is 216829. The next prime is 216841. The reversal of 216838 is 838612.

216838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2²¹⁶⁸³⁸ is an apocalyptic number.

216838 is a deficient number, since it is larger than the sum of its proper divisors (110762).

216838 is a wasteful number, since it uses less digits than its factorization.

216838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782.

The product of its digits is 2304, while the sum is 28.

The square root of 216838 is about 465.6586732790. The cubic root of 216838 is about 60.0774924648.

It can be divided in two parts, 21 and 6838, that added together give a cube (6859 = 19³).

The spelling of 216838 in words is "two hundred sixteen thousand, eight hundred thirty-eight".