328404145 has 4 divisors (see below), whose sum is σ = 394084980. Its totient is φ = 262723312.

The previous prime is 328404127. The next prime is 328404157. The reversal of 328404145 is 541404823.

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 136609344 + 191794801 = 11688^2 + 13849^2 .

It is a cyclic number.

It is not a de Polignac number, because 328404145 - 2¹⁵ = 328371377 is a prime.

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, 32840410 + ... + 32840419.

It is an arithmetic number, because the mean of its divisors is an integer number (98521245).

Almost surely, 2^328404145 is an apocalyptic number.

It is an amenable number.

328404145 is a deficient number, since it is larger than the sum of its proper divisors (65680835).

328404145 is an equidigital number, since it uses as much as digits as its factorization.

328404145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65680834.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 328404145 is about 18121.9244287134. The cubic root of 328404145 is about 689.9265797395.

Adding to 328404145 its reverse (541404823), we get a palindrome (869808968).

The spelling of 328404145 in words is "three hundred twenty-eight million, four hundred four thousand, one hundred forty-five".