218836 has 6 divisors (see below), whose sum is σ = 382970. Its totient is φ = 109416.

The previous prime is 218833. The next prime is 218839. The reversal of 218836 is 638812.

218836 is nontrivially palindromic in base 6.

It is an interprime number because it is at equal distance from previous prime (218833) and next prime (218839).

It can be written as a sum of positive squares in only one way, i.e., 176400 + 42436 = 420^2 + 206^2 .

It is a d-powerful number, because it can be written as 2¹³ + 1 + 8³ + 8⁵ + 3¹¹ + 6³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27351 + ... + 27358.

2²¹⁸⁸³⁶ is an apocalyptic number.

It is an amenable number.

218836 is a deficient number, since it is larger than the sum of its proper divisors (164134).

218836 is a wasteful number, since it uses less digits than its factorization.

218836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54713 (or 54711 counting only the distinct ones).

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

The square root of 218836 is about 467.7991021796. The cubic root of 218836 is about 60.2614516550.

The spelling of 218836 in words is "two hundred eighteen thousand, eight hundred thirty-six".