329646780 has 48 divisors (see below), whose sum is σ = 1025569440. Its totient is φ = 87905664.

The previous prime is 329646773. The next prime is 329646781. The reversal of 329646780 is 87646923.

329646780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329646781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304689 + ... + 305768.

It is an arithmetic number, because the mean of its divisors is an integer number (21366030).

Almost surely, 2^329646780 is an apocalyptic number.

329646780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

329646780 is an abundant number, since it is smaller than the sum of its proper divisors (695922660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

329646780 is a wasteful number, since it uses less digits than its factorization.

329646780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610475 (or 610467 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 329646780 is about 18156.1774611288. The cubic root of 329646780 is about 690.7956794562.

The spelling of 329646780 in words is "three hundred twenty-nine million, six hundred forty-six thousand, seven hundred eighty".