340218 has 24 divisors (see below), whose sum is σ = 756756. Its totient is φ = 110400.

The previous prime is 340211. The next prime is 340237. The reversal of 340218 is 812043.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 294849 + 45369 = 543^2 + 213^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 340218.

It is not an unprimeable number, because it can be changed into a prime (340211) 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, 508 + ... + 968.

2³⁴⁰²¹⁸ is an apocalyptic number.

340218 is an abundant number, since it is smaller than the sum of its proper divisors (416538).

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

340218 is a wasteful number, since it uses less digits than its factorization.

340218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 340218 is about 583.2820929876. The cubic root of 340218 is about 69.8102343212.

The spelling of 340218 in words is "three hundred forty thousand, two hundred eighteen".