328530385 has 8 divisors (see below), whose sum is σ = 396415656. Its totient is φ = 261371520.

The previous prime is 328530379. The next prime is 328530401. The reversal of 328530385 is 583035823.

It can be written as a sum of positive squares in 4 ways, for example, as 1607824 + 326922561 = 1268^2 + 18081^2 .

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

It is not a de Polignac number, because 328530385 - 2⁵ = 328530353 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, 180604 + ... + 182413.

It is an arithmetic number, because the mean of its divisors is an integer number (49551957).

Almost surely, 2^328530385 is an apocalyptic number.

It is an amenable number.

328530385 is a deficient number, since it is larger than the sum of its proper divisors (67885271).

328530385 is a wasteful number, since it uses less digits than its factorization.

328530385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363203.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 328530385 is about 18125.4071678404. The cubic root of 328530385 is about 690.0149720199.

It can be divided in two parts, 3285 and 30385, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 328530385 in words is "three hundred twenty-eight million, five hundred thirty thousand, three hundred eighty-five".