3818218220 has 24 divisors (see below), whose sum is σ = 8048757024. Its totient is φ = 1521478016.

The previous prime is 3818218181. The next prime is 3818218223. The reversal of 3818218220 is 228128183.

It is not an unprimeable number, because it can be changed into a prime (3818218223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357689 + ... + 368208.

It is an arithmetic number, because the mean of its divisors is an integer number (335364876).

Almost surely, 2^3818218220 is an apocalyptic number.

It is an amenable number.

3818218220 is an abundant number, since it is smaller than the sum of its proper divisors (4230538804).

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

3818218220 is a wasteful number, since it uses less digits than its factorization.

3818218220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726169 (or 726167 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 3818218220 is about 61791.7326185308. The cubic root of 3818218220 is about 1562.9805798097.

The spelling of 3818218220 in words is "three billion, eight hundred eighteen million, two hundred eighteen thousand, two hundred twenty".