321444450 has 120 divisors (see below), whose sum is σ = 901140240. Its totient is φ = 84952800.

The previous prime is 321444437. The next prime is 321444457. The reversal of 321444450 is 54444123.

It is a happy number.

321444450 is a `hidden beast` number, since 3 + 214 + 4 + 445 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321444457) 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 59 ways as a sum of consecutive naturals, for example, 562665 + ... + 563235.

It is an arithmetic number, because the mean of its divisors is an integer number (7509502).

Almost surely, 2^321444450 is an apocalyptic number.

321444450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 321444450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450570120).

321444450 is an abundant number, since it is smaller than the sum of its proper divisors (579695790).

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

321444450 is a wasteful number, since it uses less digits than its factorization.

321444450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 321444450 is about 17928.8719667468. The cubic root of 321444450 is about 685.0179901859.

Adding to 321444450 its reverse (54444123), we get a palindrome (375888573).

The spelling of 321444450 in words is "three hundred twenty-one million, four hundred forty-four thousand, four hundred fifty".