328305785 has 8 divisors (see below), whose sum is σ = 417141576. Its totient is φ = 247194880.

The previous prime is 328305767. The next prime is 328305799. The reversal of 328305785 is 587503823.

It can be written as a sum of positive squares in 4 ways, for example, as 167624809 + 160680976 = 12947^2 + 12676^2 .

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

It is not a de Polignac number, because 328305785 - 2⁸ = 328305529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1931126 + ... + 1931295.

It is an arithmetic number, because the mean of its divisors is an integer number (52142697).

Almost surely, 2^328305785 is an apocalyptic number.

It is an amenable number.

328305785 is a deficient number, since it is larger than the sum of its proper divisors (88835791).

328305785 is a wasteful number, since it uses less digits than its factorization.

328305785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862443.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 328305785 is about 18119.2103856653. The cubic root of 328305785 is about 689.8576931197.

The spelling of 328305785 in words is "three hundred twenty-eight million, three hundred five thousand, seven hundred eighty-five".