326320405 has 4 divisors (see below), whose sum is σ = 391584492. Its totient is φ = 261056320.

The previous prime is 326320391. The next prime is 326320433. The reversal of 326320405 is 504023623.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133610481 + 192709924 = 11559^2 + 13882^2 .

It is not a de Polignac number, because 326320405 - 2⁵ = 326320373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 326320405.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 32632036 + ... + 32632045.

It is an arithmetic number, because the mean of its divisors is an integer number (97896123).

Almost surely, 2^326320405 is an apocalyptic number.

It is an amenable number.

326320405 is a deficient number, since it is larger than the sum of its proper divisors (65264087).

326320405 is an equidigital number, since it uses as much as digits as its factorization.

326320405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65264086.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 326320405 is about 18064.3407020572. The cubic root of 326320405 is about 688.4642768603.

The spelling of 326320405 in words is "three hundred twenty-six million, three hundred twenty thousand, four hundred five".