328035781 has 2 divisors, whose sum is σ = 328035782. Its totient is φ = 328035780.

The previous prime is 328035767. The next prime is 328035803. The reversal of 328035781 is 187530823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178462881 + 149572900 = 13359^2 + 12230^2 .

It is a cyclic number.

It is not a de Polignac number, because 328035781 - 2⁵ = 328035749 is a prime.

It is a super-2 number, since 2×328035781² = 215214947232559922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328035781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328035751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164017890 + 164017891.

It is an arithmetic number, because the mean of its divisors is an integer number (164017891).

Almost surely, 2^328035781 is an apocalyptic number.

It is an amenable number.

328035781 is a deficient number, since it is larger than the sum of its proper divisors (1).

328035781 is an equidigital number, since it uses as much as digits as its factorization.

328035781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 328035781 is about 18111.7580869445. The cubic root of 328035781 is about 689.6685245349.

The spelling of 328035781 in words is "three hundred twenty-eight million, thirty-five thousand, seven hundred eighty-one".