322421440 has 112 divisors (see below), whose sum is σ = 845600544. Its totient is φ = 117089280.

The previous prime is 322421413. The next prime is 322421443. The reversal of 322421440 is 44124223.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (322421443) by changing a digit.

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, 425542 + ... + 426298.

Almost surely, 2^322421440 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 322421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422800272).

322421440 is an abundant number, since it is smaller than the sum of its proper divisors (523179104).

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

322421440 is an equidigital number, since it uses as much as digits as its factorization.

322421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 322421440 is about 17956.0975715772. The cubic root of 322421440 is about 685.7112969446.

Adding to 322421440 its reverse (44124223), we get a palindrome (366545663).

The spelling of 322421440 in words is "three hundred twenty-two million, four hundred twenty-one thousand, four hundred forty".