457218 has 16 divisors (see below), whose sum is σ = 1016160. Its totient is φ = 152388.

The previous prime is 457213. The next prime is 457229. The reversal of 457218 is 812754.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 457191 and 457200.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 457218.

It is not an unprimeable number, because it can be changed into a prime (457213) by changing a digit.

457218 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 7 ways as a sum of consecutive naturals, for example, 4180 + ... + 4287.

It is an arithmetic number, because the mean of its divisors is an integer number (63510).

2⁴⁵⁷²¹⁸ is an apocalyptic number.

457218 is an abundant number, since it is smaller than the sum of its proper divisors (558942).

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

457218 is a wasteful number, since it uses less digits than its factorization.

457218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8478 (or 8472 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 457218 is about 676.1789703917. The cubic root of 457218 is about 77.0384920270.

The spelling of 457218 in words is "four hundred fifty-seven thousand, two hundred eighteen".