328428805 has 8 divisors (see below), whose sum is σ = 394220952. Its totient is φ = 262672128.

The previous prime is 328428803. The next prime is 328428811. The reversal of 328428805 is 508824823.

It can be written as a sum of positive squares in 4 ways, for example, as 73994404 + 254434401 = 8602^2 + 15951^2 .

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 328428805 - 2¹ = 328428803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328428803) 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, 20137 + ... + 32593.

It is an arithmetic number, because the mean of its divisors is an integer number (49277619).

Almost surely, 2^328428805 is an apocalyptic number.

It is an amenable number.

328428805 is a deficient number, since it is larger than the sum of its proper divisors (65792147).

328428805 is a wasteful number, since it uses less digits than its factorization.

328428805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17735.

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 328428805 is about 18122.6048072566. The cubic root of 328428805 is about 689.9438482626.

The spelling of 328428805 in words is "three hundred twenty-eight million, four hundred twenty-eight thousand, eight hundred five".