328564481 has 4 divisors (see below), whose sum is σ = 375502272. Its totient is φ = 281626692.

The previous prime is 328564471. The next prime is 328564487. The reversal of 328564481 is 184465823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 328564481 - 2¹⁰ = 328563457 is a prime.

It is a super-2 number, since 2×328564481² = 215909236349598722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (328564487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23468885 + ... + 23468898.

It is an arithmetic number, because the mean of its divisors is an integer number (93875568).

Almost surely, 2^328564481 is an apocalyptic number.

It is an amenable number.

328564481 is a deficient number, since it is larger than the sum of its proper divisors (46937791).

328564481 is an equidigital number, since it uses as much as digits as its factorization.

328564481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46937790.

The product of its digits is 184320, while the sum is 41.

The square root of 328564481 is about 18126.3477016193. The cubic root of 328564481 is about 690.0388418938.

The spelling of 328564481 in words is "three hundred twenty-eight million, five hundred sixty-four thousand, four hundred eighty-one".