329985978 has 24 divisors (see below), whose sum is σ = 754522848. Its totient is φ = 94248072.

The previous prime is 329985973. The next prime is 329986043. The reversal of 329985978 is 879589923.

It is not an unprimeable number, because it can be changed into a prime (329985973) 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, 116325 + ... + 119127.

It is an arithmetic number, because the mean of its divisors is an integer number (31438452).

Almost surely, 2^329985978 is an apocalyptic number.

329985978 is an abundant number, since it is smaller than the sum of its proper divisors (424536870).

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

329985978 is an frugal number, since it uses more digits than its factorization.

329985978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618 (or 2815 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 60.

The square root of 329985978 is about 18165.5161776372. The cubic root of 329985978 is about 691.0325351903.

The spelling of 329985978 in words is "three hundred twenty-nine million, nine hundred eighty-five thousand, nine hundred seventy-eight".