4006218 has 16 divisors (see below), whose sum is σ = 8148960. Its totient is φ = 1312656.

The previous prime is 4006201. The next prime is 4006229. The reversal of 4006218 is 8126004.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4006194 and 4006203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5305 + ... + 6012.

It is an arithmetic number, because the mean of its divisors is an integer number (509310).

Almost surely, 2^4006218 is an apocalyptic number.

4006218 is an abundant number, since it is smaller than the sum of its proper divisors (4142742).

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

4006218 is a wasteful number, since it uses less digits than its factorization.

4006218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11381.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 4006218 is about 2001.5538963515. The cubic root of 4006218 is about 158.8223164436.

It can be divided in two parts, 4006 and 218, that added together give a palindrome (4224).

The spelling of 4006218 in words is "four million, six thousand, two hundred eighteen".