326347840 has 168 divisors, whose sum is σ = 974137752. Its totient is φ = 103219200.

The previous prime is 326347831. The next prime is 326347849. The reversal of 326347840 is 48743623.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (326347831) and next prime (326347849).

It can be written as a sum of positive squares in 4 ways, for example, as 73410624 + 252937216 = 8568^2 + 15904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 326347840.

It is not an unprimeable number, because it can be changed into a prime (326347849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203040 + ... + 204640.

It is an arithmetic number, because the mean of its divisors is an integer number (5798439).

Almost surely, 2^326347840 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 326347840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487068876).

326347840 is an abundant number, since it is smaller than the sum of its proper divisors (647789912).

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

326347840 is a wasteful number, since it uses less digits than its factorization.

326347840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 326347840 is about 18065.1000550786. The cubic root of 326347840 is about 688.4835702581.

The spelling of 326347840 in words is "three hundred twenty-six million, three hundred forty-seven thousand, eight hundred forty".