328188897 has 12 divisors (see below), whose sum is σ = 474260644. Its totient is φ = 218695680.

The previous prime is 328188851. The next prime is 328188941. The reversal of 328188897 is 798881823.

It can be written as a sum of positive squares in 2 ways, for example, as 207100881 + 121088016 = 14391^2 + 11004^2 .

It is not a de Polignac number, because 328188897 - 2²⁰ = 327140321 is a prime.

It is a super-2 number, since 2×328188897² = 215415904228153218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328188097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17697 + ... + 31137.

Almost surely, 2^328188897 is an apocalyptic number.

It is an amenable number.

328188897 is a deficient number, since it is larger than the sum of its proper divisors (146071747).

328188897 is a wasteful number, since it uses less digits than its factorization.

328188897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16160 (or 16157 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 328188897 is about 18115.9845716428. The cubic root of 328188897 is about 689.7758124855.

It can be divided in two parts, 328 and 188897, that added together give a square (189225 = 435²).

The spelling of 328188897 in words is "three hundred twenty-eight million, one hundred eighty-eight thousand, eight hundred ninety-seven".