328697447 has 4 divisors (see below), whose sum is σ = 353981880. Its totient is φ = 303413016.

The previous prime is 328697443. The next prime is 328697449. The reversal of 328697447 is 744796823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744796823 = 9397 ⋅79259.

It is a cyclic number.

It is not a de Polignac number, because 328697447 - 2² = 328697443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328697395 and 328697404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328697441) 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, 12642197 + ... + 12642222.

It is an arithmetic number, because the mean of its divisors is an integer number (88495470).

Almost surely, 2^328697447 is an apocalyptic number.

328697447 is a deficient number, since it is larger than the sum of its proper divisors (25284433).

328697447 is a wasteful number, since it uses less digits than its factorization.

328697447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25284432.

The product of its digits is 2032128, while the sum is 50.

The square root of 328697447 is about 18130.0150854874. The cubic root of 328697447 is about 690.1319127478.

The spelling of 328697447 in words is "three hundred twenty-eight million, six hundred ninety-seven thousand, four hundred forty-seven".