328530081 has 16 divisors (see below), whose sum is σ = 478540800. Its totient is φ = 198826320.

The previous prime is 328530071. The next prime is 328530107. The reversal of 328530081 is 180035823.

It is a happy number.

It is not a de Polignac number, because 328530081 - 2¹⁵ = 328497313 is a prime.

It is a super-2 number, since 2×328530081² = 215864028243733122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (328530001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17820 + ... + 31218.

It is an arithmetic number, because the mean of its divisors is an integer number (29908800).

Almost surely, 2^328530081 is an apocalyptic number.

It is an amenable number.

328530081 is a deficient number, since it is larger than the sum of its proper divisors (150010719).

328530081 is a wasteful number, since it uses less digits than its factorization.

328530081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14156.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 328530081 is about 18125.3987818199. The cubic root of 328530081 is about 690.0147591886.

The spelling of 328530081 in words is "three hundred twenty-eight million, five hundred thirty thousand, eighty-one".