326421216 has 432 divisors, whose sum is σ = 1176411600. Its totient is φ = 85155840.

The previous prime is 326421209. The next prime is 326421229. The reversal of 326421216 is 612124623.

326421216 is a `hidden beast` number, since 3 + 2 + 642 + 1 + 2 + 16 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 326421216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11255890 + ... + 11255918.

It is an arithmetic number, because the mean of its divisors is an integer number (2723175).

Almost surely, 2^326421216 is an apocalyptic number.

326421216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326421216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588205800).

326421216 is an abundant number, since it is smaller than the sum of its proper divisors (849990384).

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

326421216 is a wasteful number, since it uses less digits than its factorization.

326421216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 81 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 326421216 is about 18067.1308181460. The cubic root of 326421216 is about 688.5351659060.

Adding to 326421216 its reverse (612124623), we get a palindrome (938545839).

The spelling of 326421216 in words is "three hundred twenty-six million, four hundred twenty-one thousand, two hundred sixteen".