328278025 has 24 divisors (see below), whose sum is σ = 418734360. Its totient is φ = 255191040.

The previous prime is 328277993. The next prime is 328278037. The reversal of 328278025 is 520872823.

It can be written as a sum of positive squares in 12 ways, for example, as 2944656 + 325333369 = 1716^2 + 18037^2 .

It is not a de Polignac number, because 328278025 - 2⁵ = 328277993 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143289 + ... + 145561.

It is an arithmetic number, because the mean of its divisors is an integer number (17447265).

Almost surely, 2^328278025 is an apocalyptic number.

It is an amenable number.

328278025 is a deficient number, since it is larger than the sum of its proper divisors (90456335).

328278025 is a wasteful number, since it uses less digits than its factorization.

328278025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 328278025 is about 18118.4443316748. Note that the first 3 decimals coincide. The cubic root of 328278025 is about 689.8382488594.

The spelling of 328278025 in words is "three hundred twenty-eight million, two hundred seventy-eight thousand, twenty-five".