451445320 has 64 divisors (see below), whose sum is σ = 1106136000. Its totient is φ = 165166848.

The previous prime is 451445303. The next prime is 451445341. The reversal of 451445320 is 23544154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11799 + ... + 32281.

It is an arithmetic number, because the mean of its divisors is an integer number (17283375).

Almost surely, 2^451445320 is an apocalyptic number.

451445320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451445320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553068000).

451445320 is an abundant number, since it is smaller than the sum of its proper divisors (654690680).

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

451445320 is a wasteful number, since it uses less digits than its factorization.

451445320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20542 (or 20538 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 451445320 is about 21247.2426446351. The cubic root of 451445320 is about 767.1289721681.

Adding to 451445320 its reverse (23544154), we get a palindrome (474989474).

The spelling of 451445320 in words is "four hundred fifty-one million, four hundred forty-five thousand, three hundred twenty".