324161728 has 56 divisors (see below), whose sum is σ = 707068944. Its totient is φ = 146227200.

The previous prime is 324161723. The next prime is 324161741. The reversal of 324161728 is 827161423.

It is a junction number, because it is equal to n+sod(n) for n = 324161693 and 324161702.

It is not an unprimeable number, because it can be changed into a prime (324161723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94768 + ... + 98128.

Almost surely, 2^324161728 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 324161728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353534472).

324161728 is an abundant number, since it is smaller than the sum of its proper divisors (382907216).

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

324161728 is a wasteful number, since it uses less digits than its factorization.

324161728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521 (or 3511 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 324161728 is about 18004.4918839716. The cubic root of 324161728 is about 686.9428057480.

The spelling of 324161728 in words is "three hundred twenty-four million, one hundred sixty-one thousand, seven hundred twenty-eight".