322543728 has 160 divisors (see below), whose sum is σ = 1011046400. Its totient is φ = 97853184.

The previous prime is 322543709. The next prime is 322543729. The reversal of 322543728 is 827345223.

322543728 is a `hidden beast` number, since 32 + 254 + 372 + 8 = 666.

322543728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 322543692 and 322543701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (322543729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 443301 + ... + 444027.

It is an arithmetic number, because the mean of its divisors is an integer number (6319040).

Almost surely, 2^322543728 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 322543728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505523200).

322543728 is an abundant number, since it is smaller than the sum of its proper divisors (688502672).

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

322543728 is a wasteful number, since it uses less digits than its factorization.

322543728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 824 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 322543728 is about 17959.5024429966. The cubic root of 322543728 is about 685.7979781777.

The spelling of 322543728 in words is "three hundred twenty-two million, five hundred forty-three thousand, seven hundred twenty-eight".