328866081 has 4 divisors (see below), whose sum is σ = 438488112. Its totient is φ = 219244052.

The previous prime is 328866053. The next prime is 328866089. The reversal of 328866081 is 180668823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180668823 = 3 ⋅60222941.

It is a cyclic number.

It is not a de Polignac number, because 328866081 - 2⁵ = 328866049 is a prime.

It is a super-2 number, since 2×328866081² = 216305798464597122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (328866089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54811011 + ... + 54811016.

It is an arithmetic number, because the mean of its divisors is an integer number (109622028).

Almost surely, 2^328866081 is an apocalyptic number.

It is an amenable number.

328866081 is a deficient number, since it is larger than the sum of its proper divisors (109622031).

328866081 is a wasteful number, since it uses less digits than its factorization.

328866081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109622030.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 328866081 is about 18134.6651747420. The cubic root of 328866081 is about 690.2499136727.

The spelling of 328866081 in words is "three hundred twenty-eight million, eight hundred sixty-six thousand, eighty-one".