4000218220 has 12 divisors (see below), whose sum is σ = 8400458304. Its totient is φ = 1600087280.

The previous prime is 4000218169. The next prime is 4000218253. The reversal of 4000218220 is 228120004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100005436 + ... + 100005475.

It is an arithmetic number, because the mean of its divisors is an integer number (700038192).

Almost surely, 2^4000218220 is an apocalyptic number.

It is an amenable number.

4000218220 is an abundant number, since it is smaller than the sum of its proper divisors (4400240084).

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

4000218220 is a wasteful number, since it uses less digits than its factorization.

4000218220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200010920 (or 200010918 counting only the distinct ones).

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

The square root of 4000218220 is about 63247.2783604164. The cubic root of 4000218220 is about 1587.4299183314.

Adding to 4000218220 its reverse (228120004), we get a palindrome (4228338224).

The spelling of 4000218220 in words is "four billion, two hundred eighteen thousand, two hundred twenty".