328391760 has 80 divisors (see below), whose sum is σ = 1021559616. Its totient is φ = 87266304.

The previous prime is 328391759. The next prime is 328391779. The reversal of 328391760 is 67193823.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×328391760² = 215682296071795200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 71452 + ... + 75908.

Almost surely, 2^328391760 is an apocalyptic number.

328391760 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328391760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510779808).

328391760 is an abundant number, since it is smaller than the sum of its proper divisors (693167856).

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

328391760 is a wasteful number, since it uses less digits than its factorization.

328391760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780 (or 4774 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 328391760 is about 18121.5827123350. The cubic root of 328391760 is about 689.9179066374.

The spelling of 328391760 in words is "three hundred twenty-eight million, three hundred ninety-one thousand, seven hundred sixty".