216836 has 12 divisors (see below), whose sum is σ = 383040. Its totient is φ = 107400.

The previous prime is 216829. The next prime is 216841. The reversal of 216836 is 638612.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

216836 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, 425 + ... + 783.

It is an arithmetic number, because the mean of its divisors is an integer number (31920).

2²¹⁶⁸³⁶ is an apocalyptic number.

It is an amenable number.

216836 is a deficient number, since it is larger than the sum of its proper divisors (166204).

216836 is a wasteful number, since it uses less digits than its factorization.

216836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 512 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 216836 is about 465.6565257784. The cubic root of 216836 is about 60.0773077565.

The spelling of 216836 in words is "two hundred sixteen thousand, eight hundred thirty-six".