329891645 has 16 divisors (see below), whose sum is σ = 414830592. Its totient is φ = 251370240.

The previous prime is 329891621. The next prime is 329891687. The reversal of 329891645 is 546198923.

It is not a de Polignac number, because 329891645 - 2⁸ = 329891389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 329891645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21764 + ... + 33666.

It is an arithmetic number, because the mean of its divisors is an integer number (25926912).

Almost surely, 2^329891645 is an apocalyptic number.

It is an amenable number.

329891645 is a deficient number, since it is larger than the sum of its proper divisors (84938947).

329891645 is a wasteful number, since it uses less digits than its factorization.

329891645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12172.

The product of its digits is 466560, while the sum is 47.

The square root of 329891645 is about 18162.9195065111. The cubic root of 329891645 is about 690.9666804882.

The spelling of 329891645 in words is "three hundred twenty-nine million, eight hundred ninety-one thousand, six hundred forty-five".