328856761 has 2 divisors, whose sum is σ = 328856762. Its totient is φ = 328856760.

The previous prime is 328856729. The next prime is 328856779. The reversal of 328856761 is 167658823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312405625 + 16451136 = 17675^2 + 4056^2 .

It is a cyclic number.

It is not a de Polignac number, because 328856761 - 2⁵ = 328856729 is a prime.

It is a super-2 number, since 2×328856761² = 216293538510822242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (328856861) 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, 164428380 + 164428381.

It is an arithmetic number, because the mean of its divisors is an integer number (164428381).

Almost surely, 2^328856761 is an apocalyptic number.

It is an amenable number.

328856761 is a deficient number, since it is larger than the sum of its proper divisors (1).

328856761 is an equidigital number, since it uses as much as digits as its factorization.

328856761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 328856761 is about 18134.4082065007. The cubic root of 328856761 is about 690.2433930955.

The spelling of 328856761 in words is "three hundred twenty-eight million, eight hundred fifty-six thousand, seven hundred sixty-one".