328009397 has 4 divisors (see below), whose sum is σ = 328223520. Its totient is φ = 327795276.

The previous prime is 328009351. The next prime is 328009399. The reversal of 328009397 is 793900823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 328009397 - 2¹⁸ = 327747253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328009399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104747 + ... + 107832.

It is an arithmetic number, because the mean of its divisors is an integer number (82055880).

Almost surely, 2^328009397 is an apocalyptic number.

It is an amenable number.

328009397 is a deficient number, since it is larger than the sum of its proper divisors (214123).

328009397 is a wasteful number, since it uses less digits than its factorization.

328009397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214122.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 328009397 is about 18111.0297056794. The cubic root of 328009397 is about 689.6500339684.

The spelling of 328009397 in words is "three hundred twenty-eight million, nine thousand, three hundred ninety-seven".