338821218 has 48 divisors (see below), whose sum is σ = 764749440. Its totient is φ = 112429296.

The previous prime is 338821193. The next prime is 338821277. The reversal of 338821218 is 812128833.

338821218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×338821218² = 229599635534007048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114696 + ... + 117612.

It is an arithmetic number, because the mean of its divisors is an integer number (15932280).

Almost surely, 2^338821218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 338821218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382374720).

338821218 is an abundant number, since it is smaller than the sum of its proper divisors (425928222).

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

338821218 is a wasteful number, since it uses less digits than its factorization.

338821218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173 (or 3161 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 338821218 is about 18407.0969465584. The cubic root of 338821218 is about 697.1456681038.

The spelling of 338821218 in words is "three hundred thirty-eight million, eight hundred twenty-one thousand, two hundred eighteen".