328832381 has 2 divisors, whose sum is σ = 328832382. Its totient is φ = 328832380.

The previous prime is 328832347. The next prime is 328832417. The reversal of 328832381 is 183238823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194156356 + 134676025 = 13934^2 + 11605^2 .

It is an emirp because it is prime and its reverse (183238823) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328832381 is a prime.

It is a super-2 number, since 2×328832381² = 216261469588258322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328892381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164416190 + 164416191.

It is an arithmetic number, because the mean of its divisors is an integer number (164416191).

Almost surely, 2^328832381 is an apocalyptic number.

It is an amenable number.

328832381 is a deficient number, since it is larger than the sum of its proper divisors (1).

328832381 is an equidigital number, since it uses as much as digits as its factorization.

328832381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 328832381 is about 18133.7359912402. The cubic root of 328832381 is about 690.2263354666.

The spelling of 328832381 in words is "three hundred twenty-eight million, eight hundred thirty-two thousand, three hundred eighty-one".