328372505 has 8 divisors (see below), whose sum is σ = 394145352. Its totient is φ = 262632448.

The previous prime is 328372501. The next prime is 328372523. The reversal of 328372505 is 505273823.

It can be written as a sum of positive squares in 4 ways, for example, as 84419344 + 243953161 = 9188^2 + 15619^2 .

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 328372505 - 2² = 328372501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328372501) 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, 30179 + ... + 39591.

It is an arithmetic number, because the mean of its divisors is an integer number (49268169).

Almost surely, 2^328372505 is an apocalyptic number.

It is an amenable number.

328372505 is a deficient number, since it is larger than the sum of its proper divisors (65772847).

328372505 is an equidigital number, since it uses as much as digits as its factorization.

328372505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16395.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 328372505 is about 18121.0514319672. The cubic root of 328372505 is about 689.9044221040.

The spelling of 328372505 in words is "three hundred twenty-eight million, three hundred seventy-two thousand, five hundred five".