326720000 has 100 divisors (see below), whose sum is σ = 816540186. Its totient is φ = 130560000.

The previous prime is 326719999. The next prime is 326720011. The reversal of 326720000 is 27623.

It can be written as a sum of positive squares in 5 ways, for example, as 7311616 + 319408384 = 2704^2 + 17872^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 319490 + ... + 320510.

Almost surely, 2^326720000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408270093).

326720000 is an abundant number, since it is smaller than the sum of its proper divisors (489820186).

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

326720000 is an frugal number, since it uses more digits than its factorization.

326720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 326720000 is about 18075.3976443120. The cubic root of 326720000 is about 688.7451814161.

Adding to 326720000 its reverse (27623), we get a palindrome (326747623).

The spelling of 326720000 in words is "three hundred twenty-six million, seven hundred twenty thousand".