328945813 has 8 divisors (see below), whose sum is σ = 381549632. Its totient is φ = 277744896.

The previous prime is 328945807. The next prime is 328945823. The reversal of 328945813 is 318549823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 328945813 - 2²¹ = 326848661 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 328945813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328945823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350220 + ... + 351157.

It is an arithmetic number, because the mean of its divisors is an integer number (47693704).

Almost surely, 2^328945813 is an apocalyptic number.

It is an amenable number.

328945813 is a deficient number, since it is larger than the sum of its proper divisors (52603819).

328945813 is an equidigital number, since it uses as much as digits as its factorization.

328945813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701451.

The product of its digits is 207360, while the sum is 43.

The square root of 328945813 is about 18136.8633727004. The cubic root of 328945813 is about 690.3056917561.

The spelling of 328945813 in words is "three hundred twenty-eight million, nine hundred forty-five thousand, eight hundred thirteen".