328891925 has 6 divisors (see below), whose sum is σ = 407826018. Its totient is φ = 263113520.

The previous prime is 328891909. The next prime is 328891933. The reversal of 328891925 is 529198823.

It can be written as a sum of positive squares in 3 ways, for example, as 521284 + 328370641 = 722^2 + 18121^2 .

It is not a de Polignac number, because 328891925 - 2⁴ = 328891909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328891925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6577814 + ... + 6577863.

It is an arithmetic number, because the mean of its divisors is an integer number (67971003).

Almost surely, 2^328891925 is an apocalyptic number.

It is an amenable number.

328891925 is a deficient number, since it is larger than the sum of its proper divisors (78934093).

328891925 is a wasteful number, since it uses less digits than its factorization.

328891925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13155687 (or 13155682 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 328891925 is about 18135.3777187022. The cubic root of 328891925 is about 690.2679943369.

The spelling of 328891925 in words is "three hundred twenty-eight million, eight hundred ninety-one thousand, nine hundred twenty-five".