328660997 has 16 divisors (see below), whose sum is σ = 385093632. Its totient is φ = 274624560.

The previous prime is 328660987. The next prime is 328661009. The reversal of 328660997 is 799066823.

It is not a de Polignac number, because 328660997 - 2¹⁰ = 328659973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328660957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266372 + ... + 267602.

It is an arithmetic number, because the mean of its divisors is an integer number (24068352).

Almost surely, 2^328660997 is an apocalyptic number.

It is an amenable number.

328660997 is a deficient number, since it is larger than the sum of its proper divisors (56432635).

328660997 is a wasteful number, since it uses less digits than its factorization.

328660997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 328660997 is about 18129.0098185201. The cubic root of 328660997 is about 690.1064017109.

The spelling of 328660997 in words is "three hundred twenty-eight million, six hundred sixty thousand, nine hundred ninety-seven".