328421172 has 48 divisors (see below), whose sum is σ = 795836160. Its totient is φ = 105286272.

The previous prime is 328421167. The next prime is 328421173. The reversal of 328421172 is 271124823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328421173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94693 + ... + 98099.

It is an arithmetic number, because the mean of its divisors is an integer number (16579920).

Almost surely, 2^328421172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328421172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397918080).

328421172 is an abundant number, since it is smaller than the sum of its proper divisors (467414988).

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

328421172 is a wasteful number, since it uses less digits than its factorization.

328421172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720 (or 3718 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 328421172 is about 18122.3942126861. The cubic root of 328421172 is about 689.9385032359.

Adding to 328421172 its reverse (271124823), we get a palindrome (599545995).

The spelling of 328421172 in words is "three hundred twenty-eight million, four hundred twenty-one thousand, one hundred seventy-two".