330645 has 32 divisors (see below), whose sum is σ = 626688. Its totient is φ = 145728.

The previous prime is 330643. The next prime is 330653. The reversal of 330645 is 546033.

It is not a de Polignac number, because 330645 - 2¹ = 330643 is a prime.

It is a super-2 number, since 2×330645² = 218652232050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

330645 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 330645.

It is not an unprimeable number, because it can be changed into a prime (330641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4902 + ... + 4968.

It is an arithmetic number, because the mean of its divisors is an integer number (19584).

2³³⁰⁶⁴⁵ is an apocalyptic number.

330645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

330645 is a deficient number, since it is larger than the sum of its proper divisors (296043).

330645 is a wasteful number, since it uses less digits than its factorization.

330645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 330645 is about 575.0173910413. The cubic root of 330645 is about 69.1492254535.

Adding to 330645 its reverse (546033), we get a palindrome (876678).

The spelling of 330645 in words is "three hundred thirty thousand, six hundred forty-five".