440218 has 8 divisors (see below), whose sum is σ = 672948. Its totient is φ = 215904.

The previous prime is 440207. The next prime is 440221. The reversal of 440218 is 812044.

It can be written as a sum of positive squares in 2 ways, for example, as 418609 + 21609 = 647^2 + 147^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 440195 and 440204.

It is an unprimeable number.

440218 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, 1971 + ... + 2182.

2⁴⁴⁰²¹⁸ is an apocalyptic number.

440218 is a deficient number, since it is larger than the sum of its proper divisors (232730).

440218 is a wasteful number, since it uses less digits than its factorization.

440218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 440218 is about 663.4892614052. The cubic root of 440218 is about 76.0716084085.

The spelling of 440218 in words is "four hundred forty thousand, two hundred eighteen".