328784273 has 4 divisors (see below), whose sum is σ = 329103588. Its totient is φ = 328464960.

The previous prime is 328784249. The next prime is 328784279. The reversal of 328784273 is 372487823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372487823 = 5869 ⋅63467.

It can be written as a sum of positive squares in 2 ways, for example, as 283316224 + 45468049 = 16832^2 + 6743^2 .

It is a cyclic number.

It is not a de Polignac number, because 328784273 - 2¹⁰ = 328783249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328784279) 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, 158108 + ... + 160173.

It is an arithmetic number, because the mean of its divisors is an integer number (82275897).

Almost surely, 2^328784273 is an apocalyptic number.

It is an amenable number.

328784273 is a deficient number, since it is larger than the sum of its proper divisors (319315).

328784273 is a wasteful number, since it uses less digits than its factorization.

328784273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319314.

The product of its digits is 451584, while the sum is 44.

The square root of 328784273 is about 18132.4094648229. The cubic root of 328784273 is about 690.1926739115.

The spelling of 328784273 in words is "three hundred twenty-eight million, seven hundred eighty-four thousand, two hundred seventy-three".