328071780 has 144 divisors (see below), whose sum is σ = 1090318320. Its totient is φ = 79478784.

The previous prime is 328071773. The next prime is 328071817. The reversal of 328071780 is 87170823.

It can be written as a sum of positive squares in 8 ways, for example, as 7518564 + 320553216 = 2742^2 + 17904^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86892 + ... + 90588.

It is an arithmetic number, because the mean of its divisors is an integer number (7571655).

Almost surely, 2^328071780 is an apocalyptic number.

328071780 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 328071780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545159160).

328071780 is an abundant number, since it is smaller than the sum of its proper divisors (762246540).

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

328071780 is a wasteful number, since it uses less digits than its factorization.

328071780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758 (or 3753 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 328071780 is about 18112.7518616029. The cubic root of 328071780 is about 689.6937519343.

The spelling of 328071780 in words is "three hundred twenty-eight million, seventy-one thousand, seven hundred eighty".