329440018 has 4 divisors (see below), whose sum is σ = 494160030. Its totient is φ = 164720008.

The previous prime is 329440003. The next prime is 329440019. The reversal of 329440018 is 810044923.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810044923 = 3191 ⋅253853.

It can be written as a sum of positive squares in only one way, i.e., 320660649 + 8779369 = 17907^2 + 2963^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (329440019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82360003 + ... + 82360006.

Almost surely, 2^329440018 is an apocalyptic number.

329440018 is a deficient number, since it is larger than the sum of its proper divisors (164720012).

329440018 is a wasteful number, since it uses less digits than its factorization.

329440018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164720011.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 329440018 is about 18150.4825831161. The cubic root of 329440018 is about 690.6512216329.

The spelling of 329440018 in words is "three hundred twenty-nine million, four hundred forty thousand, eighteen".