328609925 has 18 divisors (see below), whose sum is σ = 474004818. Its totient is φ = 225331680.

The previous prime is 328609859. The next prime is 328609927. The reversal of 328609925 is 529906823.

It can be written as a sum of positive squares in 3 ways, for example, as 1940449 + 326669476 = 1393^2 + 18074^2 .

It is not a de Polignac number, because 328609925 - 2⁸ = 328609669 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328609927) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 132902 + ... + 135351.

It is an arithmetic number, because the mean of its divisors is an integer number (26333601).

Almost surely, 2^328609925 is an apocalyptic number.

328609925 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

328609925 is a deficient number, since it is larger than the sum of its proper divisors (145394893).

328609925 is a wasteful number, since it uses less digits than its factorization.

328609925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268277 (or 268265 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 328609925 is about 18127.6011926565. The cubic root of 328609925 is about 690.0706536906.

The spelling of 328609925 in words is "three hundred twenty-eight million, six hundred nine thousand, nine hundred twenty-five".