328409285 has 8 divisors (see below), whose sum is σ = 394251000. Its totient is φ = 262620864.

The previous prime is 328409269. The next prime is 328409297. The reversal of 328409285 is 582904823.

It can be written as a sum of positive squares in 4 ways, for example, as 39715204 + 288694081 = 6302^2 + 16991^2 .

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 328409285 - 2⁴ = 328409269 is a prime.

It is a super-2 number, since 2×328409285² = 215705316948422450, which contains 22 as substring.

It is a congruent 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, 1799 + ... + 25691.

It is an arithmetic number, because the mean of its divisors is an integer number (49281375).

Almost surely, 2^328409285 is an apocalyptic number.

It is an amenable number.

328409285 is a deficient number, since it is larger than the sum of its proper divisors (65841715).

328409285 is a wasteful number, since it uses less digits than its factorization.

328409285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26647.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 328409285 is about 18122.0662453264. The cubic root of 328409285 is about 689.9301791705.

The spelling of 328409285 in words is "three hundred twenty-eight million, four hundred nine thousand, two hundred eighty-five".