40218 has 8 divisors (see below), whose sum is σ = 80448. Its totient is φ = 13404.

The previous prime is 40213. The next prime is 40231. The reversal of 40218 is 81204.

40218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

40218 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 40197 and 40206.

It is not an unprimeable number, because it can be changed into a prime (40213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3346 + ... + 3357.

It is an arithmetic number, because the mean of its divisors is an integer number (10056).

2⁴⁰²¹⁸ is an apocalyptic number.

40218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40224).

40218 is a wasteful number, since it uses less digits than its factorization.

40218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6708.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 40218 is about 200.5442594541. The cubic root of 40218 is about 34.2615355322.

The spelling of 40218 in words is "forty thousand, two hundred eighteen".