329981988 has 48 divisors (see below), whose sum is σ = 881000064. Its totient is φ = 94168320.

The previous prime is 329981983. The next prime is 329982013. The reversal of 329981988 is 889189923.

It is a super-2 number, since 2×329981988² = 217776224808864288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (329981983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90358 + ... + 93938.

It is an arithmetic number, because the mean of its divisors is an integer number (18354168).

Almost surely, 2^329981988 is an apocalyptic number.

It is an amenable number.

329981988 is an abundant number, since it is smaller than the sum of its proper divisors (551018076).

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

329981988 is a wasteful number, since it uses less digits than its factorization.

329981988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692 (or 4690 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 57.

The square root of 329981988 is about 18165.4063538364. The cubic root of 329981988 is about 691.0297499902.

The spelling of 329981988 in words is "three hundred twenty-nine million, nine hundred eighty-one thousand, nine hundred eighty-eight".