218466 has 24 divisors (see below), whose sum is σ = 484380. Its totient is φ = 71136.

The previous prime is 218461. The next prime is 218479. The reversal of 218466 is 664812.

218466 = T₆₃ + T₆₄ + ... + T₁₁₅.

218466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 29241 = 435^2 + 171^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218466.

It is not an unprimeable number, because it can be changed into a prime (218461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 840 + ... + 1068.

2²¹⁸⁴⁶⁶ is an apocalyptic number.

218466 is an abundant number, since it is smaller than the sum of its proper divisors (265914).

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

218466 is a wasteful number, since it uses less digits than its factorization.

218466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 218466 is about 467.4034659692. The cubic root of 218466 is about 60.2274698679.

The spelling of 218466 in words is "two hundred eighteen thousand, four hundred sixty-six".