328805657 has 2 divisors, whose sum is σ = 328805658. Its totient is φ = 328805656.

The previous prime is 328805647. The next prime is 328805669. The reversal of 328805657 is 756508823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179452816 + 149352841 = 13396^2 + 12221^2 .

It is a cyclic number.

It is not a de Polignac number, because 328805657 - 2⁶ = 328805593 is a prime.

It is a super-2 number, since 2×328805657² = 216226320150403298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (328805647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164402828 + 164402829.

It is an arithmetic number, because the mean of its divisors is an integer number (164402829).

Almost surely, 2^328805657 is an apocalyptic number.

It is an amenable number.

328805657 is a deficient number, since it is larger than the sum of its proper divisors (1).

328805657 is an equidigital number, since it uses as much as digits as its factorization.

328805657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 328805657 is about 18132.9991176308. Note that the first 3 decimals coincide. The cubic root of 328805657 is about 690.2076368739.

The spelling of 328805657 in words is "three hundred twenty-eight million, eight hundred five thousand, six hundred fifty-seven".