328643 has 12 divisors (see below), whose sum is σ = 403560. Its totient is φ = 266112.

The previous prime is 328639. The next prime is 328651. The reversal of 328643 is 346823.

It is not a de Polignac number, because 328643 - 2² = 328639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328633) 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, 755 + ... + 1107.

It is an arithmetic number, because the mean of its divisors is an integer number (33630).

2³²⁸⁶⁴³ is an apocalyptic number.

328643 is a deficient number, since it is larger than the sum of its proper divisors (74917).

328643 is a wasteful number, since it uses less digits than its factorization.

328643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 379 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 328643 is about 573.2739310312. The cubic root of 328643 is about 69.0093805072.

The spelling of 328643 in words is "three hundred twenty-eight thousand, six hundred forty-three".